Tech: Bontrager Tubless kit and the new Shimano Dura-Ace brakes
Bontrager Race TLR Wheelset
Bontrager Tubeless Ready Conversion kit
With the Tubeless Ready (TLR) kit Bontrager aims to take all the hassle and uncertainty out of converting to tubeless tyres.
In the £124.99 box you get a full conversion kit for your 700c wheels, so that's two Bontrager R3 TLR tyres, rim strips with valves, TLR sealant to put inside your tyres and a valve tool to help you along.
While the pack comes with the highest rated R3 tyre in 23c width, there are three other options in the range. The £49.99 R3 comes in either 23c or 25c, and the slightly heavier £39.99 R2 comes in 23 and 25mm versions too.
Bontrager Race TLR wheels
To go along with the TLR kit above, Bontrager has released three sets of tubeless-ready wheels. At the bottom of the stack are the Race TLRs, which cost £99.99 for the front and £119.99 for the rear, and are compatible only with Shimano/SRAM 10speed.
Next up are the Race Lite TLRs which cost £199.99F/£249.99R, and at the top are the Race X Lite TLRs at £319.99F/429.99R. Pictured are the Race TLRs. As with other tubeless wheel systems, the Bontrager version allows a lower tyre pressure with no tube to pinch.
This increases the tyre's contact patch and gives more grip but thanks to the lack of inner tube also reduces rolling friction. Cartridge bearings should give longevity and DT spokes are a known quantity. The list weight is 1,720g.
Shimano BR-9010 Dura-Ace brakes
As you'd expect from Shimano the 9010 isn't the most exciting of names but unofficially it's the ‘aero' brake which sounds a bit more like it - at least to us.
Shimano's latest Dura-Ace brakes use a modified pull-ratio when compared to the previous generation and it turns out that it's the same one that SRAM has moved to with new Red.
The standard brake caliper still mounts through a brake bolt but the rear portion is in effect a mounting plate for the twin post direct mount - the aero brake does away with this backing plate and uses a direct mount to the fork or seatstay. You do, of course, have to have a compatible frame such as a Trek Madone 7.
At 138g for the rear and 158g for the front they are a touch lighter but it's really all about the sleeker design and the price is £154.99, so just a fiver more.
This article was first published in the February 21 issue of Cycling Weekly. You can also read our magazines on Zinio, download from the Apple store and also through Kindle Fire.