Eschewing the whole 650B craze and slotting in between their long travel Trailfox and racy Fourstroke, the new 130mm BMC Speedfox maintains their completely 29″ high end* mountain bike lineup and adds a mid-travel option for folks just looking to get out and play.
Meant to be a full fledged trail bike, the Speedfox uses BMC’s “Big Wheel Concept”, which pairs very short chainstays and stems with a long cockpit and slack head angle. All of that’s packed on to their very efficient APS suspension design in a frame that’s just 2210g (4.87 lb) for the top level, full carbon SF01 with shock and hardware. That makes for fun on the downhill sections without being a chore to pedal up hills.
Three versions will be offered, from full carbon to full alloy, with multiple builds on each frame type, with five sizes to fit virtually any rider. Check them all out below…
The Speedfox gets internal cable routing for shifting, brakes and dropper post. While it looks like there’s a lot of space between the rear wheel and seat tube, note that the seat tube intersects the downtube well ahead of the Pressfit BB90 bottom bracket. Chainstays are just 435mm (17.13″), and all frame sizes get a 70mm stem. Here’s the full geometry:
Forks are set at 130mm travel, matching the rear. Frames get BMC’s sag markers, helping with set up, too. The rear brake has replaceable mounts set for 180mm rotors, up to 203mm max.
The top level SF01 gets two build specs, letting you choose between the top kits from either Shimano or SRAM. Shown above is the SF01 XTR, which comes with the new XTR 2×11 group with integrated (removable) chain guide.
That very respectable 2210g frameset weight includes that chain guide, plus the shock, seat collar, all bolts, derailleur hanger and 12×142 rear axle. Impressive indeed.
The SF01 XX1 build gets a 1×11 group. Shared build parts include DT Swiss Spline One 1501 wheels, Conti tires, Reverb Stealth, Fizik Tundra saddle and BMC bar and stem. Claimed weights are 11.7kg (25.8 lb) for XTR and 11.4kg (25.13 lb) for XX1.
Next down the line is the SF02, which shares the carbon fiber front triangle but swaps in a triple butted alloy rear end to bring the price down. Weight bumps up to 2,790g (6.15 lb) all in. Three builds will be offered: The X0 group above, which keeps the Reverb dropper post, for a claimed weight of 12.6kg (27.78 lb).
The other two are a full XT build with Reverb (left, 12.7kg / 28lb) and an XT/SLX/Deore mix (right, 12.9kg / 28.44 lb).
For the more frugal riders, there are two SF03 builds that use an all alloy frame with a claimed weight of 3,060g (6.75 lb). Here, the brake and shift cables move outside the downtube, running full length housing through bolt-on guides. A port still allows for stealth dropper posts. The XT/SLX build (right) comes in at a claimed 13.5kg (27.76 lb) and the Deore bike is 14.0kg (30.86 lb).
Pricing TBD, available later this fall.
*BMC still offers a 26″ hardtail and a few kids bikes, but everything else is 29er.
