FOX goes 27.5+ with 110mm spacing on Factory 34 Float Fork

110mm front hub spacing for stronger wheels and wider rims and tires

27.5 Forks Plus


What is it?

If there’s any doubt that 27.5+ would take off this year, they were erased by FOX‘s introduction of this 27.5+ fork with 110mm hub spacing. This wider hub allows huge 27.5 tires like a 3.0 or 3.5 inch.

Existing front wheels use 100mm hub spacing with 100mm between the inner edges of the dropouts. This new 15×110 standard adds 10mm to the width of the dropout where each spoke flange is 5mm further from the center of the hub. The brake rotor position is moved out 5mm as well.


Fox Float 27.5+

There’s no doubt that rims are getting wider. With the advent of carbon and better construction, lighter wide wheels are available now and riders have been impressed with their performance. Sidewall support is isolated from tire pressure and riders are able to enjoy more support, traction and comfort as they lower tire pressures.

Tires are getting huge too. 2.3 is the current standard but many riders who’ve been trying 3.0 tires have been floored by its performance. The grip is unprecedented and the speed is surprisingly good depending on terrain.

So FOX answered the call from several bike manufacturers to create a fork for this new type of bike with 3.0 inch tires. Who are these manufacturers? We’ll find out at Sea Otter which we suspect will trend towards Sea Otter +.

Will this affect the current 100mm spacing forks?

No. They will be produced and will be continue to be the mainstay of the FOX line. This fork comes as an addition to existing ones.

2016 Factory 34 Float 27.5+

Blurring the line between trail and fat bikes The all-new Factory Series 34 Float 27.5+ was designed from the ground up to be extra-wide rim and tire ready.

  • Chassis designed specifically for 27.5+ wheels and tires
  • 15QR x 110mm wide-flange hub spacing
  • 4th generation FIT4 closed cartridge damper
  • New FLOAT air spring
Dedicated 27.5+ Chassis Design
  • New wide crown spacing and lower leg casting
  • Clearance for super-wide rims
  • Supports tire sizes up to 27.5” x 3.25”
  • 51mm offset
  • Travel range 110mm to 150mm
  • Price: Approx $1000
Detailed Hub and Fork Diagram

Fox Float 27.5+ - hub

Wide Flange Hub 15QR x 110mm
  • Hub flanges, brake mount, and rotor moved 5mm outboard
  • Increased width improves brace angle & wheel stiffness for larger wheels
  • 15QR x 110mm axle spacing

For more information on current 2015 FOX models, visit

About the author: Francis Cebedo

The founder of mtbr and roadbikereview, Francis Cebedo believes that every cyclist has a lot to teach and a lot to learn. "Our websites are communal hubs for sharing cycling experiences, trading adventure stories, and passing along product information and opinions." Francis' favorite bike is the last bike he rode, whether it's a dirt jumper, singlespeed, trail bike, lugged commuter or ultralight carbon road steed. Indeed, Francis loves cycling in all its forms and is happiest when infecting others with that same passion. Francis also believes that IPA will save America.

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  • Erik says:

    sure 3.0 tires have a lot of traction. But they also have a ton of friction. They will be so slow moving. Only useful going downhill

  • turbodog says:

    I’ve been running a 110mm (x20mm) axle for 15 years, with 26″ wheels. This is just another stupid standard to sell people something “new”

  • dave says:

    A 27.5+ 110mm hub fork, but no fat bike fork yet? Talk about missing the boat.

  • Shawn says:

    Wide rims work well because the rim/tire no longer has a lightbulb shape, which makes the tire unstable. It doesn’t make any sense to chase the wider rims with even wider tires. You get back to that unstable lightbulb shape. I’m running a 2.4″ tire on a Derby 40mm wide rim and couldn’t be happier. Larger tires are going to get really heavy and sluggish.

  • Sean says:

    Sweet Baby Hay-seuss! The bike I bought yesterday is already outdated.

  • Johan says:

    Which 27.5×3-3.25″ tires are available??? (Or 26×3-3.25″? I can’t really find anything except Surly’s two tires. Nokian had some years ago too, but not now.)

  • Dave says:

    Yet another option to make riders replace their “obsolete” bikes.

    First it was 7speed, then 8, 9, 10 and now 11.
    Wheel size of 26″, then 29″ and now 27.5″
    Flat bars changed to risers and now kind of in the middle.
    Now let’s change hub spacing that has been around for 30 years only to fit XC tires that will likely weigh 1200 + grams..

    What’s next?? Soon we will see ABS brakes, electronic traction control, and power steering.

    I’m all for progressing the sport and shiny new bikes however in these past 5 years, the industry is getting a little over the top.

    PS; can’t wait for the snow to melt so I can go ride my steel framed bike

  • tyrebyter says:

    I like my 20×110 hubs, but I wish the flanges were spaced wider… and now they are.

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