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Pro bike: Katie Compton's Trek Boone 9 and Boone 9 Disc

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Katie Compton (Trek Factory Racing) is once again on Trek's smooth-riding Boone 9 carbon fiber racer for the 2014-15 cyclocross season. The 10-time US national champion has a custom painted stars-and-stripes version that's in the process of being built, too

Katie Compton (Trek Factory Racing) is once again on Trek's smooth-riding Boone 9 carbon fiber racer for the 2014-15 cyclocross season. The 10-time US national champion has a custom painted stars-and-stripes version that's in the process of being built, too (Image credit: James Huang/BikeRadar)
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Brake hoses are secured with a mix of fishing line and Krazy Glue

Brake hoses are secured with a mix of fishing line and Krazy Glue (Image credit: James Huang/BikeRadar)
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The wiring is kept appropriately short on the Shimano Dura-Ace Di2 rear derailleur

The wiring is kept appropriately short on the Shimano Dura-Ace Di2 rear derailleur (Image credit: James Huang/BikeRadar)
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External nipples make for easier truing, especially with tubulars installed

External nipples make for easier truing, especially with tubulars installed (Image credit: James Huang/BikeRadar)
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While Shimano Dura-Ace outer chainrings are normally forged (and sport a super-rigid hollow structure), these outer chainrings are instead CNC-machined from flat plate - and they're nearly impossible to come by

While Shimano Dura-Ace outer chainrings are normally forged (and sport a super-rigid hollow structure), these outer chainrings are instead CNC-machined from flat plate - and they're nearly impossible to come by (Image credit: James Huang/BikeRadar)
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Katie Compton (Trek Factory Racing) is yet another Shimano-sponsored 'cross racer using the company's shaved-down XTR pedals

Katie Compton (Trek Factory Racing) is yet another Shimano-sponsored 'cross racer using the company's shaved-down XTR pedals (Image credit: James Huang/BikeRadar)
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Katie Compton (Trek Factory Racing) races on 175mm-long Shimano Dura-Ace crankarms

Katie Compton (Trek Factory Racing) races on 175mm-long Shimano Dura-Ace crankarms (Image credit: James Huang/BikeRadar)
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Shimano BR-CX70 cantilever arms and Bontrager carbon-specific cork pads take care of braking duties

Shimano BR-CX70 cantilever arms and Bontrager carbon-specific cork pads take care of braking duties (Image credit: James Huang/BikeRadar)
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Katie Compton (Trek Factory Racing) is a big fan of the pink sidewalls on her FMB tubulars. They're not just for show, mind you - the latex coating also allows for lower pressures

Katie Compton (Trek Factory Racing) is a big fan of the pink sidewalls on her FMB tubulars. They're not just for show, mind you - the latex coating also allows for lower pressures (Image credit: James Huang/BikeRadar)
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For better grip on the Shimano Dura-Ace Di2 shift buttons, husband/mechanic Mark Legg-Compton has added some texture courtesy of a Krazy Glue and Colorado sand

For better grip on the Shimano Dura-Ace Di2 shift buttons, husband/mechanic Mark Legg-Compton has added some texture courtesy of a Krazy Glue and Colorado sand (Image credit: James Huang/BikeRadar)
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But how is one supposed to attach a computer, you might wonder? Bontrager has developed its own mounts called Blendr that secure into the hole at the front of the integrated cockpit

But how is one supposed to attach a computer, you might wonder? Bontrager has developed its own mounts called Blendr that secure into the hole at the front of the integrated cockpit (Image credit: James Huang/BikeRadar)
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Grippy Bontrager tape wraps the 125mm-deep drops

Grippy Bontrager tape wraps the 125mm-deep drops (Image credit: James Huang/BikeRadar)
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The Bontrager Race XXX Lite integrated carbon fiber cockpit has a claimed weight of just 235g (complete)

The Bontrager Race XXX Lite integrated carbon fiber cockpit has a claimed weight of just 235g (complete) (Image credit: James Huang/BikeRadar)
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Katie Compton (Trek Factory Racing) stands at 1.65m (5ft 5in) tall but she runs a very forward position, which requires a 120mm-long stem

Katie Compton (Trek Factory Racing) stands at 1.65m (5ft 5in) tall but she runs a very forward position, which requires a 120mm-long stem (Image credit: James Huang/BikeRadar)
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A blank plug seals up the unused driveside derailleur housing port on the Trek Boone 9 frame

A blank plug seals up the unused driveside derailleur housing port on the Trek Boone 9 frame (Image credit: James Huang/BikeRadar)
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Trek's IsoSpeed frame design features a pivot at the seat cluster that allows the seat tube to flex independently of the top tube and seatstays. It seems gimmicky but it's remarkably effective. While Katie Compton (Trek Factory Racing) has disc brake-equipped bikes she still prefers the cantilever machines for racing in Europe

Trek's IsoSpeed frame design features a pivot at the seat cluster that allows the seat tube to flex independently of the top tube and seatstays. It seems gimmicky but it's remarkably effective. While Katie Compton (Trek Factory Racing) has disc brake-equipped bikes she still prefers the cantilever machines for racing in Europe (Image credit: James Huang/BikeRadar)
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The 'K' is for Katie, of course, and the 'C' is for Compton. As for the 'F' well, her middle name isn't Francesca...

The 'K' is for Katie, of course, and the 'C' is for Compton. As for the 'F' well, her middle name isn't Francesca... (Image credit: James Huang/BikeRadar)
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Rather than use a flimsy rubber plug, husband/mechanic Mark Legg-Compton instead fills the hole with silicone glue

Rather than use a flimsy rubber plug, husband/mechanic Mark Legg-Compton instead fills the hole with silicone glue (Image credit: James Huang/BikeRadar)
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The Shimano Dura-Ace cassette sports a 12-28t spread

The Shimano Dura-Ace cassette sports a 12-28t spread (Image credit: James Huang/BikeRadar)
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A Bontrager Affinity Pro saddle is mounted atop the Bontrager integrated seatmast head

A Bontrager Affinity Pro saddle is mounted atop the Bontrager integrated seatmast head (Image credit: James Huang/BikeRadar)
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Torx-head titanium disc rotor bolts fill the unused water bottle mounting holes

Torx-head titanium disc rotor bolts fill the unused water bottle mounting holes (Image credit: James Huang/BikeRadar)
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As Bontrager doesn't currently make a disc-compatible carbon tubular wheelset, these are custom built using hubs borrowed from an Affinity Pro wheelset

As Bontrager doesn't currently make a disc-compatible carbon tubular wheelset, these are custom built using hubs borrowed from an Affinity Pro wheelset (Image credit: James Huang/BikeRadar)
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These bolts secured the internally mounted Shimano Dura-Ace Di2 battery

These bolts secured the internally mounted Shimano Dura-Ace Di2 battery (Image credit: James Huang/BikeRadar)
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This bike also gets Bontrager's Blendr mount for a Garmin computer

This bike also gets Bontrager's Blendr mount for a Garmin computer (Image credit: James Huang/BikeRadar)
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Each of Katie Compton's (Trek Factory Racing) 10 US national championships is denoted with its own star on the fork blade

Each of Katie Compton's (Trek Factory Racing) 10 US national championships is denoted with its own star on the fork blade (Image credit: James Huang/BikeRadar)
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Don't discount the IsoSpeed feature, folks - it's the real deal

Don't discount the IsoSpeed feature, folks - it's the real deal (Image credit: James Huang/BikeRadar)
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Katie Compton (Trek Factory Racing) also has a stable of disc-equipped Trek Boone 9s, these with custom stars-and-stripes paint jobs

Katie Compton (Trek Factory Racing) also has a stable of disc-equipped Trek Boone 9s, these with custom stars-and-stripes paint jobs (Image credit: James Huang/BikeRadar)
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Katie Compton (Trek Factory Racing) spends more time in the drops than many cyclocross racers so Shimano's Di2 'sprint' shifters are especially useful

Katie Compton (Trek Factory Racing) spends more time in the drops than many cyclocross racers so Shimano's Di2 'sprint' shifters are especially useful (Image credit: James Huang/BikeRadar)
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The saddle is slammed forward on the rails to get Katie Compton's (Trek Factory Racing) preferred setback

The saddle is slammed forward on the rails to get Katie Compton's (Trek Factory Racing) preferred setback (Image credit: James Huang/BikeRadar)
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Sorry, folks. Shimano reserves the prototype bits solely for the special racers

Sorry, folks. Shimano reserves the prototype bits solely for the special racers (Image credit: James Huang/BikeRadar)
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Details, details - the brake cables are finished with bits of heat shrink tubing and secured with a mix of fishing line and Krazy Glue

Details, details - the brake cables are finished with bits of heat shrink tubing and secured with a mix of fishing line and Krazy Glue (Image credit: James Huang/BikeRadar)
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Since there are no mechanical derailleur cables used, the bottom bracket guide is replaced by a blank plate

Since there are no mechanical derailleur cables used, the bottom bracket guide is replaced by a blank plate (Image credit: James Huang/BikeRadar)
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The novel rear spoke flange layout on the Bontrager Aeolus 3 D3 rear wheel. Bontrager says the so-called 'stacked' lacing on the driveside makes for wider effective spacing and better bracing angles than a more conventional setup

The novel rear spoke flange layout on the Bontrager Aeolus 3 D3 rear wheel. Bontrager says the so-called 'stacked' lacing on the driveside makes for wider effective spacing and better bracing angles than a more conventional setup (Image credit: James Huang/BikeRadar)
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The built-in chain catcher is on hand in case of a thrown chain

The built-in chain catcher is on hand in case of a thrown chain (Image credit: James Huang/BikeRadar)
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Husband/mechanic Mark Legg has a strict 'no zip ties' policy so the Shimano Di2 wiring is bundled to the rear brake housing with sections of heat shrink tubing

Husband/mechanic Mark Legg has a strict 'no zip ties' policy so the Shimano Di2 wiring is bundled to the rear brake housing with sections of heat shrink tubing (Image credit: James Huang/BikeRadar)

This article originally appeared on BikeRadar

Katie Compton is without doubt the most successful American cyclocross racer ever with nearly two dozen World Cup wins, three World Championship medals, two overall World Cup titles, and a dominating 10 US national titles. Not surprisingly, Trek Factory Racing showers the affable Coloradan with an enviable level of equipment support so she can be prepared for any course conditions, anywhere, at any time.

While many racers are locked into using either rim brakes or disc brakes, Compton has Trek Boone 9s set up with both. Compton and her husband/mechanic Mark Legg-Compton don't travel the globe with both simultaneously, though. Compton generally prefers the lighter and less powerful rim brake bikes for the rigors of European racing, while the disc bikes are usually reserved for racing on home soil.

Compton gets to choose from disc or rim brake bikes at will

Both bikes, however, incorporate Trek's groundbreaking IsoSpeed design, which uses a mechanical pivot at the seat cluster that allows for much more flex (and thus, comfort and rear-wheel traction) at the saddle than a conventional frame. Write it off as a gimmick if you insist, but it does work – and remarkably well, in fact.

Compton should be familiar with the Trek Boone 9 chassis at this point, having ridden on it for at least part of last season, but she'll have to get used to a few major changes this time around. For one, she's moved away from SRAM Red 22 componentry in favor of Shimano Dura-Ace Di2 – and she's even moved to Shimano for pedals instead of her longstanding Crankbrothers Eggbeater 11s.

The 'K' is for Katie, the 'C' is for Compton, and the 'f'... isn't for Francesca

Compton has used Shimano's electronic transmission before, but she'll have to get used to completely different gearing. Whereas she once preferred WickWërks' rather small 42/34T chainrings paired with a SRAM 11-26T cassette, she's now on a 12-28T cassette with more conventional 36/46T chainrings (including CNC-machined outer chainrings that Shimano currently only provides to sponsored racers).

Save for the obvious differences in brake hardware, both sets of bikes are otherwise identically outfitted with ultralight Bontrager integrated carbon fiber cockpits and a collection of tires from famed French tubular maker FMB. Naturally, Bontrager supplies the wheels as well, which include the company's versatile Aeolus 3 D3 carbon tubulars on the rim brake bike. Bontrager doesn't currently offer disc-compatible carbon tubular wheels, so Compton's are custom built using Aeolus 3 D3 rims and Affinity Pro hubs.

ustom wheels are built for her Trek Boone 9 Disc

C

As for pedals, Compton is now on Shimano's prototype XTR model, which uses a specially milled-down body as compared to the standard XTR Race version for better mud clearance. While these may be appreciably heavier than the Crankbrothers pedals Compton used for years, Legg-Compton says the bigger platform – and more reliable starts that come along with it – were well worth the extra grams.

Compton's bikes may be nice to look at (and they obviously can go very, very fast) but what's always striking each time we profile one is how impeccably they're prepared. Legg-Compton says he'll spend up to three days building each one, thanks in no small part to the fanatical attention to detail. Legg-Compton has a strict 'no zip-ties' policy, for example, so the brake hoses on the Boone 9 Discs are secured with a mix of fishing line and Krazy Glue. Meanwhile, heat shrink tubing is used for the cable ends on the rim brake bikes and to pair the Di2 wires to the rear brake lines.

Look closely and there's an incredible attention paid to detail

We've often noticed that Legg-Compton is quite a fan of glue in general. More Krazy Glue – plus a bit of Colorado sand – is used to provide some much-needed texture on the Di2 shifter buttons while frame holes are sealed with clear silicone adhesive. Although it doesn't look especially tidy (sorry, Mark!), it does feel fantastic – and not unlike the similar mod we proposed a couple of years ago.

Regardless of how it looks, it certainly works well. More importantly, Compton is putting the new bikes to good use with a very strong start to this season with perhaps a strong World Cup run to follow.

A mix of Krazy Glue and "Colorado sand" adds some much-needed texture and grip to the Shimano Dura-Ace Di2 shifter buttons

Complete bike specifications
Frame: Trek Boone 9, 52cm
Fork: Trek IsoSpeed Cross
Headset: Cane Creek IS, 1 1/8-to-1 1/2in tapered, integrated
Handlebar/stem: Bontrager XXX Integrated, 400mm (c-c) x 120mm x -7°
Front brake: Shimano BR-CX70 w/ Bontrager carbon-specific pads
Rear brake: Shimano BR-CX70 w/ Bontrager carbon-specific pads
Brake levers: Shimano Dura-Ace Di2 STI Dual Control ST-9070
Rear derailleur: Shimano Dura-Ace Di2 RD-9070
Shift levers: Shimano Dura-Ace Di2 Dual Control ST-9070 w/ SW-R610 'sprint' shifters
Cassette: Shimano Dura-Ace CS-9000, 12-28T
Chain: Shimano Dura-Ace CN-9000
Crankset: Shimano Dura-Ace FC-9000, 175mm, 36/46T
Bottom bracket: Enduro XD-15
Pedals: Shimano XTR prototype
Wheelset: Bontrager Aeolus 3 D3 tubular
Front tire: FMB Super Mud tubular, 33mm, 17-24psi
Rear tire: FMB Super Mud tubular, 33mm, 17-24psi
Saddle: Bontrager Affinity Pro
Seatpost: Bontrager Ride Tuned Carbon seatmast

Critical measurements
Rider's height: 1.65m (5ft 5in)
Rider's weight: 61kg (135lb)
Saddle height from BB, c-t: 695mm
Saddle setback: 15mm
Seat tube length (c-t): 470mm
Seat tube length (c-c): 450mm
Tip of saddle nose to center of bars (next to stem): 490mm
Saddle-to-bar drop: 45mm
Head tube length: 122mm
Top tube length (effective): 531mm
Weight: 7.31kg (16.12lb)