Shopper Approved 
WHAT YOU NEED TO KNOW
- Combination graphite with steel construction
- Designed for players of all levels
- Reduced vibrations with high accuracy
- Weight ranges of 70g - more weight ranges here.
- Tapered tip - Parallel tip option here
- High modulus core for strength and power
SPECIFICATIONS
| SHAFT | FLEX | LENGTH | WEIGHT | TORQUE | TIP OD | BUTT OD | PARALLEL TIP | BEND POINT |
| SteelFiber i70cw* | Stiff | 40"-36.5" | 70gr | 2.8-3.4 | .355" | .600" | n/a | Mid |
| SteelFiber i70cw* | Regular | 40"-36.5" | 70gr | 2.8-3.4 | .355" | .600" | n/a | Mid |
| SteelFiber i70cw* | Senior | 40"-36.5" | 70gf | 2.9-3.5 | .355" | .600" | n/a | Mid |
*All Taper Tip shafts have Constant Weight. The "cw" notation is shown on the logo for all i70 taper tip shafts.
AEROTECH STEELFIBER GIVES YOU THE BEST OF BOTH WORLDS.
Steelfiber shafts by Aerotech allow you to get the best of both worlds: Get the power of graphite shafts with the stability of steel shafts.
At the core of the SteelFiber shaft is filament-wound carbon fiber. The filament winding process yields a seamless and incredibly uniform bending golf shaft. The high strength-to-weight ratio of carbon fiber delivers the desired stiffness and strength properties at lighter weights than steel, and the lightweight properties of graphite increase club head speed and promote greater distance. In addition, the vibration dampening properties of graphite reduce the risk of injury and player fatigue during the round.
The steel fiber material is produced using a bundle drawing process that utilizes multiple reductions in the diameter of stainless steel wire. Once the wire becomes thin enough, 1,000 individual wires are bundled together and placed inside an iron tube that is further reduced until each individual steel wire is 8 microns in diameter. Each 8 micron steel filament is approximately 1/10th the diameter of a human hair. Finally, 3,000 individual filaments are combined and spun onto spools.
SteelFiber Hoop Strength vs Steel:
Comparing the hoop strength of a SteelFiber shaft versus a steel shaft under the same load is equally impressive. The SteelFiber shaft has superior hoop strength to even the steel shaft giving it better stability than the benchmark of the industry.
Effect of SteelFiber on Wall Thickness:
Because the density (weight) of the steel fiber is 5x that of graphite, the shaft weight can be manipulated with 1/5th the amount of material which helps minimize wall thickness. This eliminates the ‘boardy’ feel often associated with thicker walled composite shafts promoting a more solid feel through impact.
Perimeter Weighted Golf Shaft
As the world’s first perimeter-weighted golf shaft, SteelFiber adds more stability and forgiveness with every shot. The steel fiber around the perimeter creates a greater density (weight) on the shaft’s surface that moves the shaft wall’s center of gravity (CG) outward, thus increasing the shaft’s Moment of Inertia (MOI).
WHAT YOU NEED TO KNOW
- Combination graphite with steel construction
- Designed for players of all levels
- Reduced vibrations with high accuracy
- Weight ranges of 70g - more weight ranges here.
- Tapered tip - Parallel tip option here
- High modulus core for strength and power
SPECIFICATIONS
| SHAFT | FLEX | LENGTH | WEIGHT | TORQUE | TIP OD | BUTT OD | PARALLEL TIP | BEND POINT |
| SteelFiber i70cw* | Stiff | 40"-36.5" | 70gr | 2.8-3.4 | .355" | .600" | n/a | Mid |
| SteelFiber i70cw* | Regular | 40"-36.5" | 70gr | 2.8-3.4 | .355" | .600" | n/a | Mid |
| SteelFiber i70cw* | Senior | 40"-36.5" | 70gf | 2.9-3.5 | .355" | .600" | n/a | Mid |
*All Taper Tip shafts have Constant Weight. The "cw" notation is shown on the logo for all i70 taper tip shafts.
AEROTECH STEELFIBER GIVES YOU THE BEST OF BOTH WORLDS.
Steelfiber shafts by Aerotech allow you to get the best of both worlds: Get the power of graphite shafts with the stability of steel shafts.
At the core of the SteelFiber shaft is filament-wound carbon fiber. The filament winding process yields a seamless and incredibly uniform bending golf shaft. The high strength-to-weight ratio of carbon fiber delivers the desired stiffness and strength properties at lighter weights than steel, and the lightweight properties of graphite increase club head speed and promote greater distance. In addition, the vibration dampening properties of graphite reduce the risk of injury and player fatigue during the round.
The steel fiber material is produced using a bundle drawing process that utilizes multiple reductions in the diameter of stainless steel wire. Once the wire becomes thin enough, 1,000 individual wires are bundled together and placed inside an iron tube that is further reduced until each individual steel wire is 8 microns in diameter. Each 8 micron steel filament is approximately 1/10th the diameter of a human hair. Finally, 3,000 individual filaments are combined and spun onto spools.
SteelFiber Hoop Strength vs Steel:
Comparing the hoop strength of a SteelFiber shaft versus a steel shaft under the same load is equally impressive. The SteelFiber shaft has superior hoop strength to even the steel shaft giving it better stability than the benchmark of the industry.
Effect of SteelFiber on Wall Thickness:
Because the density (weight) of the steel fiber is 5x that of graphite, the shaft weight can be manipulated with 1/5th the amount of material which helps minimize wall thickness. This eliminates the ‘boardy’ feel often associated with thicker walled composite shafts promoting a more solid feel through impact.
Perimeter Weighted Golf Shaft
As the world’s first perimeter-weighted golf shaft, SteelFiber adds more stability and forgiveness with every shot. The steel fiber around the perimeter creates a greater density (weight) on the shaft’s surface that moves the shaft wall’s center of gravity (CG) outward, thus increasing the shaft’s Moment of Inertia (MOI).
**NOTE: Many shipping carriers (USPS/Fedex/UPS) are impacted and may take longer to deliver your package, in remote areas, and during sale and US holiday periods. Transit times are based on estimated delivery windows assuming no carrier delays. Carrier delays do occur from time to time and are not eligible for shipping refunds.
SHIPPING CARRIERS & DELIVERY TIMES (In-Stock/Non-Assembled Items)
| Shipping Within the Continental US | Cutoff Time (on regular business days)** |
Transit | Cost |
|
Standard Express US D2D* (> $100+ orders) |
12pm PT | 2 to 5 business days (M-F) | FREE |
| Standard First Class Mail (< 1lb orders) - Note: longer delivery times!* | 12pm PT | 3-10 business days (M-F) (estimated days map) |
$4.75 (see exceptions*) |
| Standard Express US D2D* | 12pm PT | 2-5 business days (M-F) | $7.50-$13 (depending on weight) |
| USPS Priority Mail | 12pm PT | 2-5 business days (M-F) | $9.75 |
| 2-day Air US D2D* | 12pm PT | 2 business days (M-F) | $17-$19 (depending on weight) |
| Overnight (1 day) | 2pm PT | 1 business day (M-F) | $35-$45 (depending on box size) |
| Overnight Saturday Delivery | 2pm PT | Saturday Delivery (shipped on Friday) | Please contact us for pricing |
Above shipping rates do NOT apply for custom assembled shafts/clubs. Please see rates/methods at Checkout for delivery timeframes.
| International Shipping (Outside the US) | Cutoff Time (on regular business days)** |
Transit | Cost |
|
Fedex International Economy
|
12pm PT* | 3 to 7 business days** | Rate based on carrier method + weight/package dimensions |
| Fedex International Priority | 12pm PT* | 2 to 3 business days** | Rate based on carrier method + weight/package dimensions |
*International shipping cutoff may be variable and due to customer communications regarding duties/taxes and/or shipping-related questions. Please note once your order has shipped, we cannot cancel or revise your order.
**Additional transit days may be required for customs release.
PROCESSING (CUTOFF) TIMES
All orders for in-stock and non-assembled items (like shafts/clubs), will ship according to the cutoff time on regular business days. If there are any unforeseen delays, we will reach out to you by e-mail or phone to confirm the additional processing time. For assembled items, please allow an additional 3-5 business days to process and prepare your order before shipping.
POSSIBLE SHIPPING DELAYS
- If you selected "Standard First Class Mail", please note your order may take up to 10 business days to arrive - see estimated delivery days based on location
- If the item you chose is not in-stock (we may reach out to you for further instructions) there may be additional delays to process your order.
- Please allow longer times for your order to arrive in remote areas and during sale periods. Delivery times may also be extended during US and international holidays.
- If the address is determined to be undeliverable by the carrier, the package will not be re-shipped.
*"First Class Mail" is only offered for items under 16 oz, and non-shaft type items."Standard Express US D2D", "Expedited US D2D", and "2-day Air US D2D" shipping services may be with either USPS or Fedex. If you need a specific carrier, please choose the desired shipping option provided by that carrier (which may require additional costs). PO box delivery addresses must have USPS carrier selected as the shipping option. 2-day Air service not available for PO box addresses, Guam, Puerto Rico, Virgin Islands, Northern Marina Islands, and Armed Forces territories. First Class Mail is not recommended for customers who need their orders delivered within 5 business days. Please select a faster method/carrier (or contact us if you have questions).
**For non-personalized and non-assembled products, cutoff time on business days refers to Monday through Friday, and on non-US holidays. For orders placed on weekends (or Friday after the cutoff time), they will ship on the following business day.
If you selected a shipping method with determined delivery dates, such as "2-Day Air Shipping" or "Overnight Shipping", the delivery date will be counted as the Nth day starting with the following business day after the ship date. For example, if you place your order on a Friday after the cut-off time with 2-Day Air, your order will arrive on Wednesday (assuming no holidays in between).
IMPORTANT: All delivery times subject to in-stock products and deliverable addresses. For assembled shaft and club orders, please allow an extra 3-5 business days to process your order before shipping.
Free shipping offer only applies to orders delivered in the Continental US.
WHAT YOU NEED TO KNOW ABOUT SHIPPING
HOW CAN I TRACK MY PACKAGE?
Once your order ships, you will receive an automated email with the tracking link from our shipping carrier. Please allow 24 hrs for the tracking link to be updated correctly. For orders shipped with First Class Standard Shipping or some shaft orders, there will be no en-route updates aside from the initial carrier pick-up and final delivery update.
WHERE WILL MY ORDER SHIP FROM?
We ship every order from our 30,000 square foot warehouse in sunny Southern California. Our most common shipping carrier is with USPS (US and international), Fedex (US and International) and DHL (international).
DO YOU SHIP INTERNATIONALLY (OUTSIDE THE US)
Yes, we do! We offer competitive weight-based shipping rates with DHL (3 business days), USPS Priority (5-7 business days), Fedex International Economy (3-5 business days) and Fedex International Priority (1-2 business days) to almost country outside the US.
Please note all prices are in $USD unless otherwise stated. And with some international orders, there may be additional duties/taxes based on YOUR COUNTRY'S regulations that you will be responsible for.
To find out your international shipping rate, please add your items to the Cart and begin the checkout process. After entering your shipping address, you will see a selection of shipping carriers and their respective costs depending on the service you select. Or contact us by e-mail with your full shipping address, and the items/qtys you'd like to order, and we can provide some competitive shipping quotes for you.
If you have any questions, feel free to contact us!
Questions & Answers
Ask a Question-
How does the i70 compare to the Nippon 950gh?
The 950gh is an all steel shaft whereas the Steelfiber is a hybrid graphite+steel. Generally the Steelfiber has a smoother feel and less harshness to it, though the 950gh is a very stable design as well. Torque is also a little higher with the Steelfiber so it's good for long irons and can produce slightly longer distances.
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