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How To Choose Your Tyre Pressure For Triathlon

In association with Quarq.

Tyre pressure is an important factor often overlooked by triathletes. Mark talks you through optimum tyre pressure for triathlon and conducts an interesting experiment using the new Quarq Tyrewiz. Watch the video to find out more…

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Tyre pressure can affect rolling resistance and comfort on the bike. It can also contribute towards punctures if the pressure is too low, causing pinches between the rim and inner tube. A common misconception is that a higher pressure is faster but this has been disproved in recent studies. New technology can now give you live
tyre pressure data to your head unit, this could prove very useful!

What tyre pressure do you run? Let us know in the comments.👇

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Watch more on GTN…
Clincher Vs Tubular 📹 http://gtn.io/ClincherVsTubular
How To Fix A Puncture 📹 http://gtn.io/PunctureRepair

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Photos: © Triathlon / Getty Images

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Comments (9)

Where is the p5x? :O

50fps .. nicee!

How much the elevation change contributed to the pressure difference?

I’d be really interested to know how much the psi increases from 5am on race day then you set transition up for a 1/2 or full distance
Till 7:30-7:45 when we mount the bike at T1 exit
Due to the change in ambient temperature

I can imagine a number of interesting experiments to perform with the TyreWiz to bust or proove some myths about tyre pressure!

75psi in the front 80-85psi in the back. tubeless schwalbe 25mm tires. I’m 6’6″ 240 on a Dogma F10 disc. No issues. I ride 4-5 days a week in Marin California.I was riding to Alpine damn, my down hill speed was around 25-28 through winding roads. I hit a seem, got a mild pinch. Got to the bottom. Started my accent back and realized that my back tire was low due to air lose. Lucky I just happened to check before another decent. This would be a good aid to keep you updated.

3,5-5 bar depending on tarmac for 25mm tyres and 72kg. feels the fastest (range) and its also what some wheel companies like enve recommend.

I’m more confused than before. GCN did a similar video a while back and showed that my tire pressure should be about 90 on the rear, and 85 on the front. My local bike shop said the same – or said to simply run ~87 on both tires.. The app mentioned in this video doesn’t seem to be owned by Quarq anymore (?) but rather, SRAM (a reputable company, nonetheless?) The interface looks almost exactly the same throughout and all the choices are exactly the same. However, the app is suggesting 74 rear and 72 front. That seems way off for some one 160 lbs, running 25mm 700c tires

I was curious about my tire pressure so I used the app. It recommended 72-front 74-back. That seems really low right? For triathlon?

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