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2017 BMC Speedfox 03 SLX/XT Bike


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2017 BMC Speedfox 03 SLX/XT Bike


The BMC Speedfox 03 helps you roll out of the garage as an experienced rider, no matter how new you are to the game. It rides just like their Speedfox 01, with the front and rear triangles constructed out of formed, welded, triple-butted aluminum instead of carbon-fiber.

It’s hard not to love aluminum. The material is tough, light, and can be shaped almost as precisely as carbon-fiber. Same geometry, same linkage, new material. The result is a bike that puts you in the same position, gives you a largely similar ride, but better at resisting crashes and nicer to the wallet. Weight goes up to 3060g for the frame, but the price drop is more than worth it. This Speedfox still gives you a bike that sits in the sweet spot between all mountain and cross country, allowing you the freedom to race and enduro, but providing you with something that gives you the tools to excel at just about everything off road.

The position has been dictated by BMC’s BWC to make 29er wheels play like they’re 26” just ones that roll better. Long top tube, slack head angle, low bottom bracket, short stays keep you in control of the front wheel, the center of gravity low and the rear wheel tucked in behind.

What makes the bike such a joy in all conditions is BMC’s Advanced Pivot System, which keeps the suspension active and responding to the trail inputs no matter whether or not you’re pedaling, nor how hard. The linkages are machined aluminum and pivoting on oversized bearings. The pivots are smooth to make sure nothing locks up in stiction, and the size means there’s no lateral slop when new, and none down the trail. 130mm of suspension front and rear.

With the rear suspension, there’s a built-in sag indicator on the swingarm. It is as easy to adjust as eyeballing and dialing.

As this bike was built to stay within budget, a few things were simplified. Cable routing, for derailleurs and rear brake are now external, running under the downtube. There’s still internal routing for a dropper seatpost. The bottom bracket standard is now BSA (aka English-threaded). BMC has not installed a chain guide over the bottom bracket, but keeps the chain guide under the chainstay and the thick BMC chainstay protector that quiets chain slap and keeps the stay from getting dinged. The seat clamp comes with, as does the 142x12mm rear axle. They’ve deployed their Natural-Born postmounts for the brake, with replaceable threaded inserts and accommodating 180mm to 203mm rotors.

The BMC Speedfox 03 brings lots and lots of bike to the trailhead, and now you can ride all of it.


Bottom Bracket Shimano

Brake Calipers Shimano SLX

Brake Levers Shimano SLX

Cassette Shimano CS-HG81, 11-36

Chain KMC X-10 EPT

Crankset Shimano FC-M627, 36/22

Fork Fox Float 34, Performance, Grip, 3-Pos, 130mm

Frame Material Al-13 Premium Triple-Butted Aluminum

Front Derailleur Shimano Deore

Handlebar BMC MFB 03, 750mm

Headset Integrated

Pedals Not Included

Rear Derailleur Shimano XT

Rear Suspension Fox Float DPS, Performance, 3-Pos, 130mm

Rotors Shimano SLX, 180mm

Saddle WTB Volt Comp

Seatpost BMC MSP 03

Shifters Shimano Deore

Stem BMC MSM 03

Tires Onza: Ibex FRC 120 (F) / Canis FRC 60 (R), 29×2.25

Wheel – Front DT Swiss 483d Rim, Shimano HB-M618 Hub

Wheel – Rear DT Swiss 483d Rim, Shimano HB-M618 Hub



Size Seat Tube (c-c) Seat Tube (c-t) Top Tube Length Head Tube Length Chain Stay Length Seat Tube Angle Head Tube Angle Stand Over Height Wheel Size Stack Reach
XS 390 566 90 435 74.0 68.5 29″ 598 395
S 420 588 95 435 74.0 68.5 29″ 602 415
M 460 609 100 435 74.0 68.5 29″ 607 435
L 500 630 105 435 74.0 68.5 29″ 612 455
XL 530 652 110 435 74.0 68.5 29″ 616 475


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