It’s taken most of the summer but we’ve finished gathering parts for our 27plus project bike. We started this process earlier this year when rumors of a fat 27.5 production bike were just a whisper and no one was really sure what to make of Trek and SRAM’s “Boost” hub spacing.
Then came Sea Otter and we were inundated with bikes with 27plus wheels and tires ready to roll. Before we even had a chance to try one there were dozens of brands with production bikes ready to go. There are also quite a few aftermarket products out there already, and in the spirit of DIY we kept moving ahead with Project 27plus, initially by measuring up some new tires.
Now that all the parts are here it’s time for an update. The foundation of this project is the Advocate Cycles Hayduke frame. Made in Asia from Reynolds 725 chromoly steel it features replaceable dropouts that can be swapped to fit either a 142×12 or 148×12 Boost axles, or even a swinger dropout for singlespeed use.
Key geometry numbers include a 68.5 degree head tube angle, 430 mm chainstays and 60 mm of bottom bracket drop. It can also fit standard 29-inch tires without a problem. One reason we started with this frame is that you can bolt current 29er parts to it if you’re not sure you want to go 27plus in the future or if you’re saving for a new 27plus wheelset and fork.
The real attention-getter here is of course the wheels. The hubs are Industry Nine‘s Torch Classic model, one of the first aftermarket options for Boost spacing and some of the finest on the market. The aluminum bodies are CNC machined and anodized in Asheville, North Carolina, with angled flanges for lower stresses on the traditional, J-bend spokes.
The freehub body is switchable between standard and XD drivers and the end caps are interchangeable, though in the case of Boost there’s no QR frames to use them with (that I know of). The freehub mechanism features six pawls that engage at three degrees for nearly instant propulsion.
Laced to the hubs are WTB’s Scraper rims with a 45 mm internal width and a pair of the new WTB Bridger 3.0 tires. Unlike the, um, “trailblazing” Trailblazer 2.8 tires, these make no attempt to be anything other than a full-blown 27plus tire, with a far more aggressive tread.
They are mounted up tubeless thanks to the TCS tubeless system, which is essentially the same standard as UST. Going tubeless is highly recommended on these Plus bikes because of the low air pressures the tires run at. Something in the neighborhood of 10-12 psi is no problem.
Mounted up on the front of the Hayduke is the new 27.5 Manitou Magnum Pro fork, purpose built for Plus bikes with 110 mm hub spacing and room for up to a 3.4-inch tire. With the Dorado air spring it has tons of adjustment including high and low speed compression, rebound damping, even air volume. Tying the two 35 mm legs together is the Hex Lock QR15 axle, which takes some practice to use quickly but stays super secure.
Manitou’s sister brands contributed the finishing kit. The brakes are the new Hayes Radar model that uses mineral oil instead of DOT fluid and can be flipped upside down for easy changes between regular and moto braking. (Demo truck drivers must LOVE these.)
Answer Components supplied the Carbon SL bars, AME stem, grips and Rove R2 pedals.
Finally, propelling things is the Hope crankset. Like most Hope products it’s CNC’d from aluminum in the UK then given the anodized treatment, in this case the “gunsmoke” finish. The direct mount chainring features the now ubiquitous narrow/wide tooth profile, and it can be removed and replaced with an optional spider for a bolt-on, double chainring option. It fits the BB92 bottom bracket with a 30 mm spindle that has an expanding spline that won’t wear down after repeatedly installing and removing the crankarm, ensuring a tight fit every time.
We’re going to be evaluating each of these products for a long-term review as well as using the bike as a test bed of sorts for future Plus products. What kinds of things would you like to see evaluated?Have questions about the build? Let us know in the comments.