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Aerotech SteelFiber Iron Shaft (0.370" Parallel Tip)

$55.00 USD
Shipping calculated at checkout.

Free shipping with $99+ within the US


Flex
Tip Size
We can install these shafts for you!

If you need help with installing these shafts, our build team can do that for you. Just add this Iron Club Retrofit to your Cart (along with the shafts themselves), send us your clubs, we'll take care of the rest.

Family Owned Est. 1991

We are a family owned business since 1991 and we're dedicated to helping our customers find the best gear. When you buy from us, you're buying from people who care and love this game as much as you do.

Free Shipping with $99+ US Orders*

Orders with US delivery addresses over $99 USD (subtotal) ship for free (excluding shaft orders to Hawaii and Alaska). We also have competitive flat rate shipping options for order under $99, as well as international deliveries. See our full shipping policy/rates

BTW, our team works fast to ship and get your order delivered as quickly as possible. All in-stock order ship the same day when placed by 5pm ET (2pm PT). For items not in stock, or available as pre-order, please allow ~3-5 business days to process before shipping.

60 Day Easy Returns*

Change your mind? No problem. Our hassle-free returns portal lets you request a return and keep track of your refunds.

*Assembled shafts and custom clubs are not eligible for return. See our full return policy here.

Due to strict inventory guidelines, we do not process "exchanges". We ask that you send the items back for a refund and then repurchase whatever you need! >> Access your order history here and start a request here.

  

RETURN COSTS & RESTOCKING FEE (NON-ASSEMBLED ITEMS)

There are no restocking fees. However the cost of the return shipping label will be deducted from your refund ($7.5 for small/lite packages, $13 for standard size packages, $15 for non-standard size packages such as golf shafts), if you decide to use the label provided by us. If you purchase a label yourself from a local carrier office (ie. USPS, UPS, Fedex), then there will be no deductions from your refund. If the returned items are not in new and unused condition, we reserve the right to dispose of them or return them to you at your expense. You may purchase return shipping if you would like the items sent back.

RETURN COSTS & RESTOCKING FEE (ASSEMBLED ITEMS)


🚫 No Returns or Refunds on Assembled Shafts

Please note that all assembled shaft orders are final. Due to the custom nature of this process, we do not accept returns or offer refunds on any assembled shafts. Each order is built to your specifications, and once assembly begins, we are unable to restock or resell the components.

We encourage you to double-check all specs (flex, length, grip, adapter, etc.) before placing your order. If you need help confirming details, our team is happy to assist before you check out.


Returns can be made on non-personalized items and non-assembled items within the US, 60 days after you've received the original order. Items are only accepted on unopened and unused products. Items must be returned in the original packaging.

 

INTERNATIONAL RETURNS

We do not accept any international returns at this time.

At Grips4less, we strive to provide a smooth international shopping experience. To ensure clarity regarding shipping, duties, and returns, please review our policy below:

Duties, Taxes, and Import Fees

  • International orders may be subject to duties, taxes, and import fees imposed by your country. These charges are the customer's responsibility and are determined by local customs authorities.
  • If duties and taxes are not paid upon delivery, the carrier may be unable to complete the shipment and may return the package to us.

Refused or Unpaid Shipments

  • If an international order is refused or the required duties/taxes remain unpaid, the carrier may return the package to us.
  • In such cases, customers will be responsible for all shipping costs, including outbound and return shipping fees.
  • Refunds for returned shipments will be issued minus all incurred shipping fees.

Lost or Delayed Shipments

  • Once an international order has shipped, we are not responsible for delays caused by customs processing or other carrier-related issues.
  • If a package is significantly delayed, we encourage customers to contact their local customs office or the carrier for more information.

By placing an international order (any order shipped outside the US), you acknowledge and agree to the terms outlined in this policy.

REFUNDS

Refunds are normally processed back to the original account (ie. credit card or PayPal). If you prefer store credit, please include this note of the refund request.

HOW TO CREATE A RETURN (ITEMS RETURNED MUST BE IN NEW & UNUSED CONDITION)

1) Access your order history, and request a return here

2) Your return request will be responded to within 1 business day (not including Sat/Sun/holidays). If the request is approved, we will e-mail you a return label. 

3) Package up the original order and drop off the package at your local carrier.

4) After 1-2 weeks after receiving the return order, we will process and issue your refund (original paid price of items returned minus cost of return shipping) to the original payment account.

DID WE MAKE A MISTAKE?

If there was an issue with your order (the wrong was delivered, or the product arrived damage due to carrier neglect), we will ask you to send us some pictures. If the item is confirmed to be incorrect, we will provide a return label to send back the items. Once the items are back in our warehouse, we will resend your order with the correct items. We cannot ship out a replacement order until the original items are received back. For damanged items, we will open a claim with the carrier, and once the claim is approved, we will send the replacement item. 

CANCELATION REQUESTS

While we do our best to process cancelation requests, our shipping team works fast, and we cannot guarantee that your order will be canceled

If we are able to cancel the order for you, there will be a 5% restocking fee deducted from the refund.

RISK OF LOSS

All purchases of physical items from Grips4less are made pursuant to a shipment contract. This means that the risk of loss and title for such items pass to you upon our delivery to the carrier.

RETURNS, REFUNDS AND TITLE

Grips4less does not take title to returned items until the item arrives at our fulfillment center. 

CONNECT WITH A REAL PERSON
If you have any questions or need assistance visit our help center

100% Authenticity Guaranteed

Grips4less only sells 100% authentic products. We purchase direct from top manufacturers and ship all orders from our warehouse. We've been working with all the top brands in golf for over 3 decades, which means if there are any issues you encounter with your purchase, we are here to resolve them as quickly as possible (so you can get you back on the course!). Your satisfaction is our #1 priority!

WHAT YOU NEED TO KNOW

The Aerotech SteelFiber parallel iron shaft has a graphite composite core under a SteelFiber outer mesh, and True Temper rates it high launch, high spin with a moderate tempo. This listing is the 0.370" parallel tip, one 41" length you trim for each iron, in seven weights: i55, i60, i70, i80, i95, i110 and i125 (55 to 125 g), with flexes from Ladies and Senior up to X-Stiff depending on the weight.

Before you order: each shaft is one 41" length that gets tip- and butt-trimmed for the iron it goes in. Order one per club, or let our Retrofit Service cut and install them.


Who It's For

Good fit if you...

  • Want a graphite iron shaft with a damped feel at impact
  • Want help with height and spin: True Temper rates SteelFiber high launch, high spin
  • Want to pick the weight first: seven weights from 55 to 125 g
  • Have irons with a 0.370" parallel-tip hosel

Not the right fit if you...

  • Have irons with a 0.355" taper tip: the SteelFiber i95cw and the other cw shafts are made for each iron
  • Already hit your irons too high or with too much spin: take the Iron Shaft Finder Quiz to find a lower-flying shaft
  • Want a steel shaft: browse our iron shafts
  • Would rather not trim: the parallel shaft has to be tip- and butt-trimmed, or let our Retrofit Service do it

How It Plays

Damped feel, steady on mishits. True Temper builds SteelFiber with a graphite composite core that damps vibration, then winds more than 59 miles of fiber over it as an outer mesh to resist twisting on off-center strikes.

High flight, high spin. True Temper rates the parallel SteelFiber high on trajectory and high on spin, with a moderate tempo: a smooth, even transition rather than a hard, quick one.

Pick the weight, then the flex. The light end is the i55 at 55 g in Regular; the heavy end is the i125 at 125 g in Stiff. Torque drops as the weight goes up, from 5.1 on the i55 Regular to 1.8 on the i95 X-Stiff.


Specifications

True Temper's figures for the weights and flexes it lists, and our own figures for the builds it does not list.

Series Flex Weight (g) Torque (°) Butt Dia.
SteelFiber i55 Regular 55 5.1 0.600"
SteelFiber i55 Adult (True Temper: Amateur) 64 4.9 0.600"
SteelFiber i60 Regular (our figures) 64 4.8 0.600"
SteelFiber i60 Senior (our figures) 64 4.9 0.600"
SteelFiber i70 Regular 74 3.3 0.600"
SteelFiber i70 Senior (our figures) 74 3.5 0.600"
SteelFiber i70 Stiff 74 3.0 0.600"
SteelFiber i70 Ladies (our figures) 74 3.5 0.600"
SteelFiber i80 Regular 85 2.9 0.600"
SteelFiber i80 Senior (our figures) 85 3.0 0.600"
SteelFiber i80 Stiff 85 2.8 0.600"
SteelFiber i80 Ladies (our figures) 85 3.1 0.600"
SteelFiber i80 X-Stiff 85 2.3 0.600"
SteelFiber i95 Regular 95 2.5 0.600"
SteelFiber i95 Stiff 95 2.0 0.600"
SteelFiber i95 X-Stiff 95 1.8 0.600"
SteelFiber i110 Regular 110 2.1 0.600"
SteelFiber i110 Stiff 110 1.9 0.602"
SteelFiber i110 X-Stiff 110 1.9 0.602"
SteelFiber i125 Stiff 125 2.1 0.600"

Material: graphite composite core, SteelFiber outer mesh | Tip: 0.370" parallel | Raw length: 41" | Launch: high, spin: high, tempo: moderate (True Temper's ratings for the parallel SteelFiber) | Rows marked "our figures" and the i70 Regular and i125 Stiff torque and butt cells come from our own spec table, where True Temper lists no figure | Source: True Temper official Steelfiber (Parallel) specs, checked October 2026


Will It Fit Your Irons?

This shaft is for irons with a 0.370" parallel-tip hosel. It is a single 41" length that is tip-trimmed for each iron and then butt-trimmed to playing length, so order one shaft per club. Our trimming guide: no tip trim for the 1-iron and 2-iron, 0.5" for the 3-iron, then 0.5" more for each iron down to 3.5" for the 9-iron and pitching wedge. Never tip-trim more than the parallel tip section minus your hosel depth.

Not sure which tip your irons take? Take the Iron Shaft Finder Quiz, contact us, or let us cut and install them with our Retrofit Service.


How It Compares to Other SteelFiber Iron Shafts

SteelFiber i-series 0.370" (this page) SteelFiber fc80 0.370" SteelFiber i95cw 0.355"
Tip 0.370" parallel 0.370" parallel 0.355" taper
How it's sold One 41" length you trim One 42" length you trim One shaft per iron
Weights (True Temper) 55 to 125 g 85 g 95 g
Flexes Ladies to X-Stiff, by weight Regular, Stiff Regular, Stiff, X-Stiff
Launch / Spin (True Temper) High / High Not rated High / High
Tempo (True Temper) Moderate Moderate Moderate

Building a full set? This shaft also comes as an 8-shaft bundle set (3-iron to PW). Compare the SteelFiber fc80 0.370" and SteelFiber i95cw pages, see every SteelFiber shaft, browse all graphite iron shafts, read our Golf Shaft Guides, or start with our Iron Shaft Buyer's Guide for material, weight and flex basics.


Frequently Asked Questions

How much does each SteelFiber weight weigh?

True Temper lists the i55 Regular at 55 g and its Amateur (our Adult) at 64 g, the i70 at 74 g, the i80 at 85 g, the i95 at 95 g, the i110 at 110 g and the i125 at 125 g, all as 41" raw shafts. Our i60 builds weigh 64 g. From the i60 up, every flex of a model weighs the same.

Which weight and flex should I choose?

Pick the weight first: lighter models suit slower swings and players who want an easy, high flight, heavier ones suit faster swings that want more control. Then pick the flex. Senior and Ladies are offered on the i60, i70 and i80. True Temper does not publish a swing-speed range for SteelFiber, so take the Iron Shaft Finder Quiz or contact us if you are unsure.

0.370" parallel or 0.355" taper?

This page is the 0.370" parallel tip: one length you trim for each iron. For irons with a 0.355" taper-tip hosel, the SteelFiber cw shafts (such as the i70cw and i95cw) are made for each iron at one constant weight.

How high does it launch and how much does it spin?

True Temper rates the parallel SteelFiber high for trajectory and high for spin, with a moderate tempo. It gives one rating for the line, so it is the same at every weight.

Is SteelFiber graphite or steel?

True Temper describes it as a graphite composite core with a SteelFiber outer mesh wound over it, so it is not an all-steel shaft. We list it with our graphite iron shafts.

Questions & Answers

Have a Question?

Ask a Question
  • I have Aerotech steel Fiber i 110cw shafts and I need to replace my 8 iron. Do I need taper or parallel shaft? thanks

    You'll want to check with the manufacturer of the iron head, and ask them if it is a taper (0.355") or parallel (0.370") tip, and then match it with the shaft tip size. Here's the SteelFiber tapered tip shafts: https://www.grips4less.com/pages/search-results?q=steelfiber%20tapered

  • Is the Adult Flex in the I80 that is listed on your flex options, the same as Senior Flex as listed in the specifications chart below?

    Yes, Adult flex is the same as Senior flex.

Aerotech

Aerotech SteelFiber Iron Shaft (0.370" Parallel Tip)

$55.00 USD

The Aerotech SteelFiber parallel iron shaft has a graphite composite core under a SteelFiber outer mesh, and True Temper rates it high launch, high spin with a moderate tempo. This listing is the 0.370" parallel tip, one 41" length you trim for each iron, in seven weights: i55, i60, i70, i80, i95, i110 and i125 (55 to 125 g), with flexes from Ladies and Senior up to X-Stiff depending on the weight.

Before you order: each shaft is one 41" length that gets tip- and butt-trimmed for the iron it goes in. Order one per club, or let our Retrofit Service cut and install them.


Who It's For

Good fit if you...

  • Want a graphite iron shaft with a damped feel at impact
  • Want help with height and spin: True Temper rates SteelFiber high launch, high spin
  • Want to pick the weight first: seven weights from 55 to 125 g
  • Have irons with a 0.370" parallel-tip hosel

Not the right fit if you...

  • Have irons with a 0.355" taper tip: the SteelFiber i95cw and the other cw shafts are made for each iron
  • Already hit your irons too high or with too much spin: take the Iron Shaft Finder Quiz to find a lower-flying shaft
  • Want a steel shaft: browse our iron shafts
  • Would rather not trim: the parallel shaft has to be tip- and butt-trimmed, or let our Retrofit Service do it

How It Plays

Damped feel, steady on mishits. True Temper builds SteelFiber with a graphite composite core that damps vibration, then winds more than 59 miles of fiber over it as an outer mesh to resist twisting on off-center strikes.

High flight, high spin. True Temper rates the parallel SteelFiber high on trajectory and high on spin, with a moderate tempo: a smooth, even transition rather than a hard, quick one.

Pick the weight, then the flex. The light end is the i55 at 55 g in Regular; the heavy end is the i125 at 125 g in Stiff. Torque drops as the weight goes up, from 5.1 on the i55 Regular to 1.8 on the i95 X-Stiff.


Specifications

True Temper's figures for the weights and flexes it lists, and our own figures for the builds it does not list.

Series Flex Weight (g) Torque (°) Butt Dia.
SteelFiber i55 Regular 55 5.1 0.600"
SteelFiber i55 Adult (True Temper: Amateur) 64 4.9 0.600"
SteelFiber i60 Regular (our figures) 64 4.8 0.600"
SteelFiber i60 Senior (our figures) 64 4.9 0.600"
SteelFiber i70 Regular 74 3.3 0.600"
SteelFiber i70 Senior (our figures) 74 3.5 0.600"
SteelFiber i70 Stiff 74 3.0 0.600"
SteelFiber i70 Ladies (our figures) 74 3.5 0.600"
SteelFiber i80 Regular 85 2.9 0.600"
SteelFiber i80 Senior (our figures) 85 3.0 0.600"
SteelFiber i80 Stiff 85 2.8 0.600"
SteelFiber i80 Ladies (our figures) 85 3.1 0.600"
SteelFiber i80 X-Stiff 85 2.3 0.600"
SteelFiber i95 Regular 95 2.5 0.600"
SteelFiber i95 Stiff 95 2.0 0.600"
SteelFiber i95 X-Stiff 95 1.8 0.600"
SteelFiber i110 Regular 110 2.1 0.600"
SteelFiber i110 Stiff 110 1.9 0.602"
SteelFiber i110 X-Stiff 110 1.9 0.602"
SteelFiber i125 Stiff 125 2.1 0.600"

Material: graphite composite core, SteelFiber outer mesh | Tip: 0.370" parallel | Raw length: 41" | Launch: high, spin: high, tempo: moderate (True Temper's ratings for the parallel SteelFiber) | Rows marked "our figures" and the i70 Regular and i125 Stiff torque and butt cells come from our own spec table, where True Temper lists no figure | Source: True Temper official Steelfiber (Parallel) specs, checked October 2026


Will It Fit Your Irons?

This shaft is for irons with a 0.370" parallel-tip hosel. It is a single 41" length that is tip-trimmed for each iron and then butt-trimmed to playing length, so order one shaft per club. Our trimming guide: no tip trim for the 1-iron and 2-iron, 0.5" for the 3-iron, then 0.5" more for each iron down to 3.5" for the 9-iron and pitching wedge. Never tip-trim more than the parallel tip section minus your hosel depth.

Not sure which tip your irons take? Take the Iron Shaft Finder Quiz, contact us, or let us cut and install them with our Retrofit Service.


How It Compares to Other SteelFiber Iron Shafts

SteelFiber i-series 0.370" (this page) SteelFiber fc80 0.370" SteelFiber i95cw 0.355"
Tip 0.370" parallel 0.370" parallel 0.355" taper
How it's sold One 41" length you trim One 42" length you trim One shaft per iron
Weights (True Temper) 55 to 125 g 85 g 95 g
Flexes Ladies to X-Stiff, by weight Regular, Stiff Regular, Stiff, X-Stiff
Launch / Spin (True Temper) High / High Not rated High / High
Tempo (True Temper) Moderate Moderate Moderate

Building a full set? This shaft also comes as an 8-shaft bundle set (3-iron to PW). Compare the SteelFiber fc80 0.370" and SteelFiber i95cw pages, see every SteelFiber shaft, browse all graphite iron shafts, read our Golf Shaft Guides, or start with our Iron Shaft Buyer's Guide for material, weight and flex basics.


Frequently Asked Questions

How much does each SteelFiber weight weigh?

True Temper lists the i55 Regular at 55 g and its Amateur (our Adult) at 64 g, the i70 at 74 g, the i80 at 85 g, the i95 at 95 g, the i110 at 110 g and the i125 at 125 g, all as 41" raw shafts. Our i60 builds weigh 64 g. From the i60 up, every flex of a model weighs the same.

Which weight and flex should I choose?

Pick the weight first: lighter models suit slower swings and players who want an easy, high flight, heavier ones suit faster swings that want more control. Then pick the flex. Senior and Ladies are offered on the i60, i70 and i80. True Temper does not publish a swing-speed range for SteelFiber, so take the Iron Shaft Finder Quiz or contact us if you are unsure.

0.370" parallel or 0.355" taper?

This page is the 0.370" parallel tip: one length you trim for each iron. For irons with a 0.355" taper-tip hosel, the SteelFiber cw shafts (such as the i70cw and i95cw) are made for each iron at one constant weight.

How high does it launch and how much does it spin?

True Temper rates the parallel SteelFiber high for trajectory and high for spin, with a moderate tempo. It gives one rating for the line, so it is the same at every weight.

Is SteelFiber graphite or steel?

True Temper describes it as a graphite composite core with a SteelFiber outer mesh wound over it, so it is not an all-steel shaft. We list it with our graphite iron shafts.

Flex

  • i55 / Regular
  • i55 / Adult
  • i60 / Regular
  • i60 / Senior
  • i70 / Regular
  • i70 / Senior
  • i70 / Stiff
  • i70 / Ladies
  • i80 / Regular
  • i80 / Senior
  • i80 / Stiff
  • i80 / Ladies
  • i80 / X-Stiff
  • i95 / Regular
  • i95 / Stiff
  • i95 / X-Stiff
  • i110 / Regular
  • i110 / Stiff
  • i110 / X-Stiff
  • i125 / Stiff

Tip Size

  • 0.370"
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