Pro bike: Amy Dombroski's Ridley X-Fire

Gunning for the cyclocross worlds podium for Telenet-Fidea

Amy Dombroski may only be 1.55m (5-foot-1) but she packs a big punch and is one of the United States' hopes at a top-ten finish during Saturday's elite cyclocross world championship race. Though raised in Vermont and technically a resident of Boulder, Colorado, Dombroski bases herself in Belgium during the season and is part of the prestigious Telenet-Fidea squad. Her machine of choice is the workhorse Ridley X-Fire.

Ridley is one of just a handful of companies offering high-end 'cross framesets in a very wide size range and Dombroski is on the company's smallest option with a 41cm seat tube (center-to-center) and 502mm (virtual) top tube. Thanks to a stubby 90mm head tube, Dombroski is still able to achieve a reasonable 53mm of drop, too, for a perfectly proportional fit.

Dombroski runs her Red levers high on the aluminum Zipp bar

While the smaller dimensions could yield a truly ultralight setup, Dombroski's X-Fire is built with a similarly workhorse mix of parts for what should be an ultra-durable but still light setup. SRAM provides the bulk of the spec sheet with a previous-generation Red group (including a steel-caged front derailleur), PG-1070 cassette for mud shedding, Zipp's outstanding 303 carbon tubular wheels, an aluminum Zipp handlebar, and an SRM SRAM S975 power meter.

In keeping with typical European 'cross racer tendencies, Dombroski's X-Fire is also built with traditional Avid Shorty Ultimate cantilevers instead of the disc brakes that are already becoming widely adopted stateside. However, they're set in the narrower stance option for more power instead of the wider format that's more prevalent in Europe.

Another nod to the reliability angle is the addition of an AceCo K-Edge Cross Double XL chain catcher, whose stout, adjustable aluminum plate is mounted to a machined clamp just below the front derailleur. Chances of dropping a chain are slim-to-none here – at least to the inside.

The PF30 bottom bracket shell is filled with adapters for the threaded cups

Dombroski has long been supported by Donn Kellogg, who once handled operations for Challenge in the US but is now the face of Clement. Fittingly, she's running Clement rubber front and rear here in the form of the company's latest multi-conditions MXP rear tubular paired to a more aggressive PDX up front. Conditions in Louisville have been wildly variable and especially with the change in timetable, we'll have to wait and see what she uses on race day.

Rounding out the build kit is a Selle San Marco Regale saddle, Crankbrothers Eggbeater 4Ti pedals, FSA's Orbit Z-CX headset with built-in cable hanger, SRAM SuperCork tape, SRM PowerControl 7 computer and an aluminum stem and seatpost from Ridley house brand 4ZA.

Complete weight as pictured is 7.75kg (17.09lb).

Complete bike specifications
FrameRidley X-Fire, 41cm
Fork4ZA Oryx
HeadsetFSA Orbit Z-CX, 1 1/8-to-1 1/2" tapered
Stem4ZA Cirrus Pro, 90mm x -7°
HandlebarsZipp Service Course CSL, 42cm (c-c)
Tape/gripsSRAM SuperCork
Front brakeAvid Shorty Ultimate, narrow profile, w/ Zipp Tangente Platinum Pro Evo carbon-specific pads
Rear brakeAvid Shorty Ultimate, narrow profile, w/ Zipp Tangente Platinum Pro Evo carbon-specific pads
Brake leversSRAM Red DoubleTap
Front derailleurSRAM Red w/ steel cage
Rear derailleurSRAM Red
Shift leversSRAM Red DoubleTap
CassetteSRAM PG-1070, 12-27T
ChainSRAM PC-1091
CranksetSRM SRAM S975, 170mm, w/ 44/39T Thorne chainrings
Bottom bracketSRAM GXP w/ PF30 adapters
PedalsCrankbrothers Eggbeater 4Ti
WheelsetZipp 303 tubular
Front tireClement PDX tubular, 33mm
Rear tireClement MXP tubular, 33mm
SaddleSelle San Marco Regale w/ Xsilite rails
Seat post4ZA Cirrus
Bottle cagesn/a
ComputerSRM PowerControl 7
Other accessoriesAceCo K-Edge Cross Double XL chain catcher
Critical measurements
Rider's height1.55m (5' 1")
Rider's weight49kg (108lb)
Saddle height, from BB (c-t)635mm
Saddle setback 10mm
Seat tube length, c-t410mm
Seat tube length, c-c450mm
Tip of saddle nose to C of bars (next to stem)452mm
Saddle-to-bar drop (vertical)53mm
Head tube length90mm
Top tube length502mm (horizontal)
Total bicycle weight7.75kg (17.09lb) with computer

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