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Bontrager 27.5-Inch Wheels

27.5" (650b) is a wheel standard commonly used on mountain and gravel bikes.  The size refers to the approximate outside diameter of the wheel with a mounted tire.  The exact rim diameter (tire bead diameter) is 584mm.  These measurements are usually marked on the sidewall of the tire. 

27.5" wheels have a lot to offer mountain bikers:

  • Some riders like the snappy feel of a smaller wheel.  They're nimble and provide faster acceleration and more maneuverability than 29ers. 27.5" may be a perfect solution for those who crave precise handling while still benefiting from improved rollover capabilities.  Bikes designed to excel on white-knuckle techy situations are often built with 27.5" wheels.
  • When big air is on the menu, 27.5" wheels can take the abuse.  They're laced with shorter spokes and offer a stouter option for big hit bikes.
  • Smaller wheels are more suitable for smaller riders.  Companies like Trek recognize the disproportion of building small bikes on 29" wheels. They offer different wheels per bike size for the best fit and feel. 

Recently, 650b wheels have become very popular within the gravel community. 650b on a gravel bike allows for larger volume tires using the same frame clearance provided for 700c.  The ability to run lower tire pressures can really smooth out a ride on a gravel bike built with little to no suspension.  While 650b may not be as fast as 700c, it's hard to turn away from the added comfort and stability that come with smaller wheels and bigger tires. 

Hopefully this helps answer some of your questions about wheels.  Take a look at some of our Bontrager 27.5" wheel options below:

$209.99
A wide rim profile supports tires for unmatched traction and cornering. GENUINE REPLACEMENT PARTS When it's time to refresh your trusty bike, Trek Genuine Replacement Parts have you covered. PRODUCT DETAILS - Original equipment replacement Bontrager Powerline Comp 40 TLR wheels - Tubeless Ready (TLR) rims allow for quick transition to tubeless system upgrade - Extra wide alloy rim (44mm outer, 40mm inner width) is perfect for Plus tires - Shimano 10/11 speed, Micro Spline and SRAM XD driver available separately - Does not include skewer, reflector, rim strip, valve, or owner's manual - Wheels shipped as photographed
$189.99
A wide rim profile supports tires for unmatched traction and cornering. GENUINE REPLACEMENT PARTS When it's time to refresh your trusty bike, Trek Genuine Replacement Parts have you covered. PRODUCT DETAILS - Original equipment replacement Bontrager Line 40 Boost 141 wheels - Tubeless Ready (TLR) rims allow for quick transition to tubeless system upgrade - Extra wide alloy rim (44mm outer, 40mm inner width) is perfect for Plus tires - Does not include skewer, reflector, rim strip, valve, or owner's manual - Wheels shipped as photographed
$179.99
Get back on the bike with a genuine replacement wheel. When it's time to refresh your trusty bike, Trek genuine replacement wheels have you covered. PRODUCT DETAILS - Original equipment replacement Bontrager Kovee TLR 28H Hole wheels - Convert to tubeless with TLR rim strip and valve, sold separately - Durable alloy symmetric rim with 22.5mm internal 27mm external width - Does not include skewer, reflector, rim strip, valve, or owner's manual - Wheels shipped as photographed
$134.99
Upgrade or refresh your bike. When it's time to refresh your trusty bike, Trek Genuine Replacement Parts have you covered. PRODUCT DETAILS - Original equipment replacement Bontrager Connection Disc wheels - Durable double-wall rim with 20mm internal, 26mm external width - Black rim graphics and spoke nipples - Does not include skewer, reflector, rim strip, valve, or owner's manual - Wheels shipped as photographed
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