Whats the difference between a TT and a Tri bike

[Marek]

I was reading something recently about a TT bike being different from a Triathlon bike. Apparently something to do with the angles on a Tri bike making it easier to run when you get off the bike. Is that true, I did not quite understand this. Anyone shed some light?

Cheers

Marek......

[Jon H]

If last weekend is anything to go by Tri bikes are ridden by numpties who ride 100 mile sportives in aero helmets.

Apart from that, yes, a really steep seat tube angle that puts you further forward is supposed to make the switch from cycling to running easier. Something to do with the hip angle I think.

At the moment it's quite hard to tell TT and Tri bikes apart and they're often aimed at both markets. Now that the UCI are cracking down on the technical regulations I think the differences will become more apparent, as TT bikes will have to conform to the 3:1 aspect ratio, straight(ish) tubes, minimum saddle set-back from the BB etc. But tri bikes will still be able to use all the fancy aero gizmos.

[Andrew G]

Sometimes it can just be a name. Some manufacturers call their bikes Tri bikes to open them to a bigger market. Hutch's TT bike is named a Tri bike, I don't know the angles etc but he seems to go quite quickly on it anyway.

[Ivor]