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SRAM wireless and other TT gear at USA Pro Challenge

By Jason Sumner

published 22 August 2015

Kristin Armstrong wins on SRAM's forthcoming electric TT group

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The junction box on Kristin Armstrong's SRAM wireless TT setup(Image credit: Jason Sumner)

Check out the chainstay(Image credit: Jason Sumner)

A few of the women's teams had pre-race setups not too dissimilar from amateur squads(Image credit: Jason Sumner)

Robin Farina flies the flag for Selle SMP(Image credit: Jason Sumner)

Farina's race pedal for the time trial? Shimano 105(Image credit: Jason Sumner)

The low-stack design of Cipollini's Nuke TT bike(Image credit: Jason Sumner)

The young Axeon team enjoys a full complement of SRAM/Zipp equipment(Image credit: Jason Sumner)

The front end of the Cipollini Nuke, with removable caps for brake access(Image credit: Jason Sumner)

Axeon had a few bikes with SRAM wireless and a few mechanical setups(Image credit: Jason Sumner)

Drapac's Swift TT bikes have this unusual single-column riser(Image credit: Jason Sumner)

Swift will be coming to the US market in 2016(Image credit: Jason Sumner)

The gusty winds and steep climb in the middle of the course had riders considering all manner of options. This is Trek rider Matthew Busche's bike(Image credit: Jason Sumner)

Funny bikes bring out the funny saddle arrangements. This is SmartStop rider Evan Huffman's bike(Image credit: Jason Sumner)

Stack it up (at back) or slam it down. Diamondback's Serios TT bike gives riders some height-adjustment options(Image credit: Jason Sumner)

Tri saddles snuck into TT. Now these ISM saddles are being increasingly found on regular road bikes, such as this Diamondback belonging to Tom Zirbel(Image credit: Jason Sumner)

UHC's Kiel Reijnen has been the one non-BMC rider to win a stage (on day 3) at the USA Pro Challenge(Image credit: Jason Sumner)

Guess why Wilier calls this bike the Twin Blade(Image credit: Jason Sumner)

Good for Reijnen - he had a wind-friendly rig on a windy day(Image credit: Jason Sumner)

Microshift components aren't often seen(Image credit: Jason Sumner)

Not all teams use K-Edge mounts(Image credit: Jason Sumner)

50/34 Rotor Q Rings for Armstrong's road bike(Image credit: Jason Sumner)

Kristin Armstrong won the opening time trial of the inaugural Women's USA Pro Challenge aboard this Felt with SRAM's still-not-released wireless TT group(Image credit: Jason Sumner)

Single buttons are wires to the junction box, which transmits wirelessly to the derailleurs(Image credit: Jason Sumner)

The buttons are pressed once to shift the rear derailleur in one direction, and pressed at the same time to shift the front derailleur(Image credit: Jason Sumner)

The wires from the extensions and the cowhorns feed into the junction box(Image credit: Jason Sumner)

What exactly does the junction box do? SRAM won't yet say(Image credit: Jason Sumner)

With the Eurobike trade show coming up next week, we expect SRAM to finally start talking about its new group(Image credit: Jason Sumner)

Kristin Armstrong's SRAM Quarq with unbranded rings. Rotor isn't a team sponsor(Image credit: Jason Sumner)

We expect to see more logo'ing soon on these derailleurs(Image credit: Jason Sumner)

K-Edge took its name from this rider, having built the original chain catcher for Armstrong's succesful bid at the Beijing Olympic time trial(Image credit: Jason Sumner)

Speedplay's Aero pedal(Image credit: Jason Sumner)

K-Edge accoutrements can be found across Armstrong's bike, such as this Garmin mount(Image credit: Jason Sumner)

No, these are not Vittoria tires. Why do you ask?(Image credit: Jason Sumner)

Armstrong's road bike for stages 2 and 3(Image credit: Jason Sumner)

This is the first year the race has had a women's component, which is three days(Image credit: Jason Sumner)

What self-respecting racer would run this many spacers?! Well, one who has won numerous Olympic and world champion medals, thank you very much(Image credit: Jason Sumner)

SRAM eTap wireless road group made numerous appearances at the USA Pro Challenge, including on Armstrong's road bike(Image credit: Jason Sumner)

SRAM eTap rear derailleur(Image credit: Jason Sumner)

Although Cannondale-Garmin could run internal Di2 batteries, the teams likes the accessibilty and the solid mount of the external option. And although the team could use Garmin's Vector power-meter pedals, the riders generally choose to use an SRM for power(Image credit: Jason Sumner)

This article originally appeared on BikeRadar

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With multiple world and Olympic gold medals under her belt, the 42-year-old Kristin Armstrong can seemingly win time trials with the flip of a switch — or, as was the case on Friday at the USA Pro Challenge, the press of a button. Armstrong rode to victory in the opening stage of the inaugural Women's USA Pro Challenge aboard a Felt with SRAM's yet-unreleased electric time trial group.

SRAM still isn't talking about the group, but components are out in the open now. Armstrong's bike had bare buttons on both the extensions and the cowhorns, with wires running to a junction box atop the stem. The junction box then communicates wirelessly with the derailleurs.

With men's and women's teams setting off on the 8.5-mile course in Breckenridge, Colorado, there was a heathy mix of time-trial gear on display. WorldTour squads like BMC and Cannondale-Garmin mixed with composite squads from Colorado. Shimano Dura-Ace Di2 and Shimano 105 alike were raced.