Bontrager Line Pro 40 29+ carbon wheels review
The Line Pro 40 wheels are designed to optimally fit 29×3.0 tires.
What is it
For those in search of shaving a half-pound of rotating weight from a mid-fat 29+ bike while gaining added cornering stiffness and the increased ride quality of carbon, the Bontrager Line Pro 40 29+ wheelset features durable Trek OCLV composite rim construction, DT Swiss straight gauge spokes, Boost 110/148 hub spacing and a quick ratcheting 54-tooth Rapid Drive rear hub design. The Line Pro 40 carbon wheelset is one of several new Line Pro components that have significantly upped the quality and design aesthetics game of the Bontrager brand.
OCLV carbon rim construction make for a stiff, light and durable wheel.
Pros
- Proven 41mm wide internal OCLV composite rims
- Rapid Drive rear hub is simple and durable with quick engagement
- Boost 110/148 with Stacked Lacing improves wheel stiffness
- Tubeless ready and easy to set up
- Competitively priced for a high performance carbon wheelset
Cons
- Competitively priced but still expensive
The wheelset comes only in Boost 110 front and 148 rear spacing.
Mtbr’s Take
Do you really need a set of carbon wheels? Probably not, but for those looking to up the performance ante of their 29+ bike with Boost 110/148 spacing running up to 3-inch wide tires, the Bontrager Line Pro 40 carbon wheels deliver improved ride quality, less rotating mass and increased wheel stiffness while offering the quality reputation of Trek OCLV construction. Tubeless setup was effortless thanks to the rim’s hookless inner rim wall design, enabling tires to seat easily. Swapping the Line Plus TLR 29 alloy wheels for the Line Pro 40 carbon wheels on a Trek Stache yielded nearly a half-pound in weight savings (1,830 grams vs. 2,052 grams), a significant amount for rotating mass. The result was noticeably quicker acceleration, more supple ride quality and less cornering flex, taking the already outstanding performance of the Trek Stache to an even higher level.
Rating: 4.5 out of 5 Flamin’ Chili Peppers 
Price: $1200 a pair
More info: www.trekbikes.com
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