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Aerotech SteelFiber i-Series Iron Shaft Bundle Set (0.370" Parallel Tip, 8 Shafts)

$418.00 USD $440.00
Shipping calculated at checkout.

Free shipping within the US


Model
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 i-Series Iron Shaft Bundle Set (0.370") is a set of eight composite iron shafts with a 0.370" parallel tip, enough for 3-iron through PW. Choose a weight from i55 to i125 and a flex from Regular, Adult, Stiff, Ladies or X-Stiff (the flexes differ by weight). True Temper rates the parallel SteelFiber high trajectory, high spin and moderate tempo.

Before you order: these are parallel-tip shafts for irons with a 0.370" hosel. Every shaft comes at the same 41" raw length. Only need one or two clubs? Buy the SteelFiber i-series parallel single shaft.


What's in the Set

Set What you get Available in
#3-PW 8 shafts: 3, 4, 5, 6, 7, 8, 9-iron and PW i55 and i60: Regular, Adult. i70: Regular, Adult, Stiff, Ladies. i80: Regular, Adult, Stiff, Ladies, X-Stiff. i95 and i110: Regular, Stiff, X-Stiff. i125: Stiff

Shafts only; club heads and grips are not included. Every shaft in a set is the same model and flex. Parallel-tip shafts come at one raw length, so your club builder trims the tip and then the butt of each shaft to fit each iron. Want us to install them? See our Retrofit Service.


Who It's For

Good fit if you...

  • Are reshafting 3-iron through PW with 0.370" parallel hosels
  • Want graphite that damps vibration with a steel-like feel on off-center hits
  • Want a wide weight choice, from about 55 g (i55) up to 125 g (i125)
  • Like a higher flight: True Temper rates the parallel SteelFiber high trajectory and high spin

Not the right fit if you...


How It Plays

Graphite core, steel fiber outside. True Temper builds SteelFiber with a graphite composite core that damps vibration, wrapped in a SteelFiber outer mesh it says runs to more than 59 miles of fiber. The mesh resists twisting on off-center strikes, much as steel does.

Trimmed to fit. True Temper makes the parallel SteelFiber in 55g, 70g, 80g, 95g, 110g and 125g and says every one is tip and butt trimmed into 0.370" iron heads. It rates the shaft high trajectory, high spin and moderate tempo.


Specifications

Series Flex Weight (g) Torque (°) Butt Dia. Raw Length
SteelFiber i55 Regular 55 5.1 0.600" 41"
SteelFiber i55 Adult (Amateur) 64 4.9 0.600" 41"
SteelFiber i70 Regular 74 Not published 0.600" 41"
SteelFiber i70 Adult (Amateur) 74 3.5 0.600" 41"
SteelFiber i70 Stiff 74 3.0 0.600" 41"
SteelFiber i70 Ladies 74 Not published 0.600" 41"
SteelFiber i80 Regular 85 2.9 0.600" 41"
SteelFiber i80 Stiff 85 2.8 0.600" 41"
SteelFiber i80 Ladies 85 Not published 0.600" 41"
SteelFiber i80 X-Stiff 85 2.3 0.600" 41"
SteelFiber i95 Regular 95 2.5 0.600" 41"
SteelFiber i95 Stiff 95 2.0 0.600" 41"
SteelFiber i95 X-Stiff 95 1.8 0.600" 41"
SteelFiber i110 Regular 110 2.1 0.600" 41"
SteelFiber i110 Stiff 110 1.9 0.602" 41"
SteelFiber i110 X-Stiff 110 1.9 0.602" 41"
SteelFiber i125 Stiff 125 Not published 0.600" 41"

Material: graphite composite core with SteelFiber outer mesh | Tip: 0.370" parallel | Trajectory: High, spin: High, tempo: Moderate (True Temper ratings) | One 41" length for every iron | Adult rows show True Temper's Amateur figures. True Temper lists the 55g Amateur at 64 g and the Regular at 55 g as shown. Ladies rows, the i70 Regular and i125 Stiff lengths and butt sizes come from our earlier spec sheet; True Temper gives no torque for those builds | We also sell the i60 (Regular, Adult) and the i80 Adult, which True Temper does not list; contact us for details on those builds | Source: True Temper official Steelfiber (Parallel) specs, checked October 2026


Which Weight Should I Choose?

True Temper publishes no swing speed chart for the parallel SteelFiber. It sells the shaft by weight and flex, so choose the weight first and then your flex. Here is how the weights line up on True Temper's figures.

True Temper weight Flexes listed Weight (g) Torque (°)
55g Amateur, Regular 64 (Amateur), 55 (Regular) 4.9–5.1
70g Amateur, Regular, Stiff 74 3.5–3.0
80g Regular, Stiff, X-Stiff 85 2.9–2.3
95g Regular, Stiff, X-Stiff 95 2.5–1.8
110g Regular, Stiff, X-Stiff 110 2.1–1.9
125g Stiff 125 Not published

Torque falls as the weight goes up. Not sure? Take the Iron Shaft Finder Quiz.


How It Compares

SteelFiber i-series set (this page) fc80 parallel set SteelFiber i-series single
Tip 0.370" parallel 0.370" parallel 0.370" parallel
How it's sold Set of 8 Set of 8 One shaft
Weights (True Temper) 55 g to 125 g 85 g 55 g to 125 g
Tip design Standard SteelFiber Softer, progressive Flight Control tip Standard SteelFiber
Lengths One 41" length One 42" length One 41" length
Ratings (True Temper) High trajectory, high spin, moderate tempo Moderate tempo High trajectory, high spin, moderate tempo

Browse all iron shaft bundle sets or graphite iron shafts, read our Golf Shaft Guides for the whole lineup, or start with our Iron Shaft Buyer's Guide for material, weight and flex basics.


Frequently Asked Questions

How many shafts are in the SteelFiber i-series bundle set?

Eight, enough for 3-iron through pitching wedge. All eight come at the same 41" length and in the same weight and flex.

Which weight and flex should I choose?

True Temper publishes no swing speed chart for the parallel SteelFiber. Pick the weight closest to your current iron shafts, then the flex you play now; torque drops from about 5 in the i55 to under 2 in the i110. Not sure? Take the Iron Shaft Finder Quiz.

Is the Adult flex the same as True Temper's Amateur?

Our Adult option is shown with True Temper's Amateur figures where True Temper lists one (i55 and i70). True Temper lists no Amateur for the 80g and no i60 at all, so contact us before ordering the i60 or the i80 Adult.

Do the shafts need to be trimmed?

Yes. Every shaft comes at 41" with a 0.370" parallel tip, so your club builder trims the tip for each iron and then cuts the butt to final length. Tip trimming changes how the shaft plays, so follow your builder's trim chart.

What's the difference between the SteelFiber i-series and the fc80 parallel sets?

The tip. SteelFiber FC ("Flight Control") has a softer, progressive tip that True Temper says adds height in the mid and long irons. The i-series set comes in more weights, 55 g to 125 g, while the fc80 is 85 g in Regular or Stiff.

Questions & Answers

Have a Question?

Ask a Question
  • Do these shafts come with grips?

    No, the shafts do not come with grips, however you can order grips separately, here's our in stock grip selection: https://www.grips4less.com/collections/in-stock-grips

    We can install them for you (please e-mail us for cost information), however we'd recommend you have them installed locally because most players need to have the shaft butt trimmed BEFORE grip installation. For example, if you play standard length, your club-builder will trim first, and then install the grips after measuring along with the head.

Aerotech

Aerotech SteelFiber i-Series Iron Shaft Bundle Set (0.370" Parallel Tip, 8 Shafts)

$418.00 USD $440.00

The Aerotech SteelFiber i-Series Iron Shaft Bundle Set (0.370") is a set of eight composite iron shafts with a 0.370" parallel tip, enough for 3-iron through PW. Choose a weight from i55 to i125 and a flex from Regular, Adult, Stiff, Ladies or X-Stiff (the flexes differ by weight). True Temper rates the parallel SteelFiber high trajectory, high spin and moderate tempo.

Before you order: these are parallel-tip shafts for irons with a 0.370" hosel. Every shaft comes at the same 41" raw length. Only need one or two clubs? Buy the SteelFiber i-series parallel single shaft.


What's in the Set

Set What you get Available in
#3-PW 8 shafts: 3, 4, 5, 6, 7, 8, 9-iron and PW i55 and i60: Regular, Adult. i70: Regular, Adult, Stiff, Ladies. i80: Regular, Adult, Stiff, Ladies, X-Stiff. i95 and i110: Regular, Stiff, X-Stiff. i125: Stiff

Shafts only; club heads and grips are not included. Every shaft in a set is the same model and flex. Parallel-tip shafts come at one raw length, so your club builder trims the tip and then the butt of each shaft to fit each iron. Want us to install them? See our Retrofit Service.


Who It's For

Good fit if you...

  • Are reshafting 3-iron through PW with 0.370" parallel hosels
  • Want graphite that damps vibration with a steel-like feel on off-center hits
  • Want a wide weight choice, from about 55 g (i55) up to 125 g (i125)
  • Like a higher flight: True Temper rates the parallel SteelFiber high trajectory and high spin

Not the right fit if you...


How It Plays

Graphite core, steel fiber outside. True Temper builds SteelFiber with a graphite composite core that damps vibration, wrapped in a SteelFiber outer mesh it says runs to more than 59 miles of fiber. The mesh resists twisting on off-center strikes, much as steel does.

Trimmed to fit. True Temper makes the parallel SteelFiber in 55g, 70g, 80g, 95g, 110g and 125g and says every one is tip and butt trimmed into 0.370" iron heads. It rates the shaft high trajectory, high spin and moderate tempo.


Specifications

Series Flex Weight (g) Torque (°) Butt Dia. Raw Length
SteelFiber i55 Regular 55 5.1 0.600" 41"
SteelFiber i55 Adult (Amateur) 64 4.9 0.600" 41"
SteelFiber i70 Regular 74 Not published 0.600" 41"
SteelFiber i70 Adult (Amateur) 74 3.5 0.600" 41"
SteelFiber i70 Stiff 74 3.0 0.600" 41"
SteelFiber i70 Ladies 74 Not published 0.600" 41"
SteelFiber i80 Regular 85 2.9 0.600" 41"
SteelFiber i80 Stiff 85 2.8 0.600" 41"
SteelFiber i80 Ladies 85 Not published 0.600" 41"
SteelFiber i80 X-Stiff 85 2.3 0.600" 41"
SteelFiber i95 Regular 95 2.5 0.600" 41"
SteelFiber i95 Stiff 95 2.0 0.600" 41"
SteelFiber i95 X-Stiff 95 1.8 0.600" 41"
SteelFiber i110 Regular 110 2.1 0.600" 41"
SteelFiber i110 Stiff 110 1.9 0.602" 41"
SteelFiber i110 X-Stiff 110 1.9 0.602" 41"
SteelFiber i125 Stiff 125 Not published 0.600" 41"

Material: graphite composite core with SteelFiber outer mesh | Tip: 0.370" parallel | Trajectory: High, spin: High, tempo: Moderate (True Temper ratings) | One 41" length for every iron | Adult rows show True Temper's Amateur figures. True Temper lists the 55g Amateur at 64 g and the Regular at 55 g as shown. Ladies rows, the i70 Regular and i125 Stiff lengths and butt sizes come from our earlier spec sheet; True Temper gives no torque for those builds | We also sell the i60 (Regular, Adult) and the i80 Adult, which True Temper does not list; contact us for details on those builds | Source: True Temper official Steelfiber (Parallel) specs, checked October 2026


Which Weight Should I Choose?

True Temper publishes no swing speed chart for the parallel SteelFiber. It sells the shaft by weight and flex, so choose the weight first and then your flex. Here is how the weights line up on True Temper's figures.

True Temper weight Flexes listed Weight (g) Torque (°)
55g Amateur, Regular 64 (Amateur), 55 (Regular) 4.9–5.1
70g Amateur, Regular, Stiff 74 3.5–3.0
80g Regular, Stiff, X-Stiff 85 2.9–2.3
95g Regular, Stiff, X-Stiff 95 2.5–1.8
110g Regular, Stiff, X-Stiff 110 2.1–1.9
125g Stiff 125 Not published

Torque falls as the weight goes up. Not sure? Take the Iron Shaft Finder Quiz.


How It Compares

SteelFiber i-series set (this page) fc80 parallel set SteelFiber i-series single
Tip 0.370" parallel 0.370" parallel 0.370" parallel
How it's sold Set of 8 Set of 8 One shaft
Weights (True Temper) 55 g to 125 g 85 g 55 g to 125 g
Tip design Standard SteelFiber Softer, progressive Flight Control tip Standard SteelFiber
Lengths One 41" length One 42" length One 41" length
Ratings (True Temper) High trajectory, high spin, moderate tempo Moderate tempo High trajectory, high spin, moderate tempo

Browse all iron shaft bundle sets or graphite iron shafts, read our Golf Shaft Guides for the whole lineup, or start with our Iron Shaft Buyer's Guide for material, weight and flex basics.


Frequently Asked Questions

How many shafts are in the SteelFiber i-series bundle set?

Eight, enough for 3-iron through pitching wedge. All eight come at the same 41" length and in the same weight and flex.

Which weight and flex should I choose?

True Temper publishes no swing speed chart for the parallel SteelFiber. Pick the weight closest to your current iron shafts, then the flex you play now; torque drops from about 5 in the i55 to under 2 in the i110. Not sure? Take the Iron Shaft Finder Quiz.

Is the Adult flex the same as True Temper's Amateur?

Our Adult option is shown with True Temper's Amateur figures where True Temper lists one (i55 and i70). True Temper lists no Amateur for the 80g and no i60 at all, so contact us before ordering the i60 or the i80 Adult.

Do the shafts need to be trimmed?

Yes. Every shaft comes at 41" with a 0.370" parallel tip, so your club builder trims the tip for each iron and then cuts the butt to final length. Tip trimming changes how the shaft plays, so follow your builder's trim chart.

What's the difference between the SteelFiber i-series and the fc80 parallel sets?

The tip. SteelFiber FC ("Flight Control") has a softer, progressive tip that True Temper says adds height in the mid and long irons. The i-series set comes in more weights, 55 g to 125 g, while the fc80 is 85 g in Regular or Stiff.

Model

  • i55
  • i60
  • i70
  • i80
  • i95
  • i110
  • i125

Flex

  • Regular
  • Adult
  • Stiff
  • Ladies
  • X-Stiff

Tip Size

  • 0.370"
View product
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