One of the only rim brake bikes left in the Tour de France peloton! Check out the Giant Trinity TT bike

The adoption of disc brakes in the pro peloton took some time, and whilst it would appear that all WorldTour teams are now using disc brakes, Jayco Alula are in fact still using rim brakes on their Giant Trinity time trial bikes. Let's take a look at some of the history behind this bike, that remains a hugely popular choice on the British TT scene. 

Most new road bikes and time trial bikes now come with disc brakes only, but Giant is yet to release a new Giant Trinity TT bike with disc brakes. 

This means that despite Jayco Alula using Giant's Propel Advanced SL and TCR Advanced SL road bikes, both with disc brakes, they are still using rim brakes for time trials. 

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The Giant Trinity was first introduced in the early 2000s as a dedicated time trial and triathlon bike, and was further developed by Simon Smart, Founder of Drag2Zero, in 2007. 

Smart was contacted by Lars Teutenberg, Technical Director of the T-Mobile team, who asked him to create a prototype TT bike purely for the team using his expertise from working in Formula 1. The Trinity had a wind-tunnel-tested shape, and was the first bike to have an integrated front end with internal cables and integrated brakes. 

It featured an aero nosecone headtube, which really stood out at the time. The Trinity went on to win six national TT titles in its debut weekend in June 2008.

Pic: Jonathan Shubert

Three years ago we interviewed Jonathan Shubert, who rode a (heavily tailwind-assisted) 100 miles in a ridiculous 2hrs 57mins for a new RRA record at the time.

Shubert used his Giant Trinity that was over ten years old, and he thought that the Giant Trinity frame was still one of the fastest frames out there. He claimed to have the lowest drag coefficient (CdA) ever recorded at the Boardman Performance Centre wind tunnel.  

It's no wonder then that the Trinity TT bike is such a long-standing model.  

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The Trinity TT bike can still be seen today in the WorldTour peloton ridden by Team Jayco Alula's riders, one of only two WorldTour teams using rim brakes at this year's Tour de France. The other one is Arkéa Samsic, who use the rim brake-equipped Bianchi Aquila for time trials (their road bikes are all disc brake). 

Taking a look at the spec of Luke Durbridge's TT bike, we can see that he uses Sync Ergonomics - 3d printed EVO PRO TI extensions - the same extensions used by Team UAE, which feature a three-piece modular design with a claimed weight of 300g per set of extensions. 

You can see the custom 3D-printed grips for his fingers, and the Di2 shifters are neatly tucked away.

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Jayco Alula's main equipment sponsor is Shimano, and they can be seen riding a Dura-Ace Di2 groupset. 

Electronic gear shifters on a TT bike can give a better UCI-compliant position, and are easier to change when you're in the red towards the end of a time trial. 

It's not uncommon to see non-sponsor wheels used, and despite Jayco Alula covering their wheels with wheel bags, their wheel sponsors are Giant's Cadex brand, using the Aero 4-spoke and Aero Disc WheelSystem.

These have hookless rims and an internal width of 22.4mm, which Cadex says is ideal for tyres between 25mm and 32mm wide.

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You can also see that the Di2 junction box is in an interesting place underneath his saddle. 

Don't forget to check out our other Bikes at Bedtime before you hit the hay.

Have you made the switch to disc brakes on all your bikes? Let us know in the comments section below...