I9 Hydra x Duroc 40 29+ Wheelset
I9 Hydra x Duroc 40 29+ Wheelset
I9 Hydra x Duroc 40 29+ Wheelset
I9 Hydra x Duroc 40 29+ Wheelset
I9 Hydra x Duroc 40 29+ Wheelset
I9 Hydra x Duroc 40 29+ Wheelset
I9 Hydra x Duroc 40 29+ Wheelset
I9 Hydra x Duroc 40 29+ Wheelset
I9 Hydra x Duroc 40 29+ Wheelset
I9 Hydra x Duroc 40 29+ Wheelset
I9 Hydra x Duroc 40 29+ Wheelset

I9 Hydra x Duroc 40 29+ Wheelset

🔥 Check your cart price. Our sitewide 10% discount applies automatically at checkout
$1,299.00
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Hub:
Rim:
Front Hub Spacing:
Rear Hub Spacing:
Rotor:
Freehub:
Tubeless Ready:
Fit or driver questions?
Front Hub Spacing
Rear Hub Spacing
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Why Buy From Fyxation?

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✅ Rider-owned & operated in Milwaukee since 2010

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✅ In stock & ships fast from Wisconsin

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Fat Bike Hub Driver

Shimano HG
Fits Shimano 8–11 speed MTB cassettes. This is the most common freehub standard and works with most Shimano and SRAM mountain cassettes, except XD-only cassettes.

SRAM XD
Fits SRAM 11 and 12-speed XD cassettes. Required for cassettes with a 10-tooth small cog and offers a wider gear range. Not compatible with Shimano HG cassettes.

Shimano Micro Spline (MS)
Fits Shimano 12-speed MTB cassettes. Shimano’s 12-speed standard, designed to support a 10-tooth small cog while maintaining strength and durability.

Fat Bike Hub Spacing

Fat bike hubs use wider spacing to clear large tires and frames. Hub sizing describes the axle type and the frame or fork spacing.

Front Hub Spacing

135QR -Uses a 9mm quick release axle with 135mm fork spacing. Common on older fat bikes.

150QR - Uses a 9mm quick release axle with 150mm fork spacing.

15×150mm Thru Axle - Uses a 15mm thru axle with 150mm fork spacing. Stiffer and more secure than quick release.

Rear Hub Spacing

170QR - Uses a 10mm quick release axle with 170mm rear frame spacing. Found on some older fat bikes.

12×197mm Thru Axle - Uses a 12mm thru axle with 197mm rear frame spacing. This is the modern fat bike standard.

How to Read Hub Sizing

Quick Release (QR) hubs use a 9mm or 10mm axle that clamps into open dropouts.

Thru Axle hubs use a solid axle that passes through the frame or fork and threads in.

In a size like 12×197mm:
• 12mm = axle diameter
• 197mm = rear frame spacing

In a size like 150QR:
• QR = 9mm quick release axle
• 150mm = fork spacing

  • LEAD TIME: Each Fyxation wheelset is custom built by hand for you! We strive to ship your wheels within 5 business days. However, Industry 9 is currently experiencing delays on some hub colors of up to 2 - 3 weeks.

    Designed to convert your winter fat bike into an all season trail machine, the 29+" Industry 9 wheels are built around Industry 9 new Hydra hubs and Sun-Ringle's Duroc 40 rims, making this tubeless ready wheelset perfect for race day or weekend trail rides. Optimized for 2.6"-3.0" wide tires, these will shed weight and keep the fun rolling all year round! Industry 9 hubs are designed to fit a multitude of frames with front hub spacing of 15x150mm and rear hub spacing of 12x170/177mm and 12x190/197mm available. Thru-axle not included

    We proudly build and true each wheel by hand here in Milwaukee meaning these wheels are ride ready out of the box.

     
    • Front Hub: Industry 9 Hydra hub
    • Rear Hub: Industry 9 Hydra hub rear hub
    • Rim: Sun-Ringle Duroc, welded, tubeless ready, 40mm, 32 hole 
    • Spokes: Wheelsmith stainless 2.0 mm straight gauge, black
    • Nipples: Wheelsmith brass nipples, black
    • Weight: 2100g 
    • Spokes: Wheelsmith stainless 2.0 mm straight gauge, black
    • Nipples: Wheelsmith brass nipples, black
    • Colors: Black, Silver, Blue, Purple, Pink, Orange, Red, Forest Green, Lime Green
    • Built by hand

Will this fit my bike?
Check out our fit guide below for some of the most popular fatbikes. Don't see yours? Reach out to us via the chat icon below.

What freehub driver types fit this hub? Shimano HG, SRAM XD, and Shimano Micro Spline options are available.

What does 12×197mm mean? A 12mm thru-axle and 197mm frame spacing, the modern fat-bike rear standard. Therefore, a front hub at 15x150mm is a 15mm thru-axle and 150mm fork spacing.

See more detail on our wheel fitment guide-->

BIKE FITMENT GUIDE

Which hub fits my bike? Use this guide to find your wheel fitment including hub spacing, axle size and hub driver. Need more detail or can't find your bike? Reach out via our chat below.
Brand Model Year (typical) Hub Spacing (Front / Rear) Hub Driver
9:ZERO:7 Lynx 2016–present 150×15 / 197×12 HG (most)
9:ZERO:7 Whiteout 2016–present 150×15 / 197×12 HG (most)
Cannondale Fat CAAD 2015–2018 150×15 / 197×12 (varies) HG (most) / Proprietary (Lefty – confirm)
Cannondale FatBoy (older) 2014–2017 135 QR / 170–190 QR HG (most)
Framed Alaskan 2016–2021 150×15 / 197×12 HG (most)
Framed Minnesota 2015–2021 135 QR or 150×15 / 190–197 HG (most)
Otso Cycles Arctodus 2019–present 150×15 / 197×12 HG (most) / XD optional
Otso Cycles Voytek 2016–present 150×15 / 197×12 HG (most) / XD optional
Rocky Mountain Blizzard 2016–present 150×15 / 197×12 HG (most)
Salsa Cycles Beargrease 2016–present 150×15 / 177 or 197×12 HG (most) / XD optional
Salsa Cycles Blackborow 2018–present 150×15 / 197×12 HG (most)
Salsa Cycles Mukluk 2016–present 150×15 / 197×12 HG (most)
Specialized Fatboy 2015–2018 135 QR / 170–190 QR HG (most)
Surly Ice Cream Truck 2016–present 150×15 / 197×12 HG (most)
Surly Pugsley (late models) 2014–2016 135 QR / 170 QR HG (most)
Surly Wednesday 2016–present 150×15 / 197×12 HG (most)
Trek Farley 2016–present 150×15 / 197×12 (some 177) HG (most) / XD optional

 
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