Ducati Sporting Club UK > DesmoDue Race Series > DesmoDue - General Questions and Chat > What size tyres do the DD bikes use?

[Zimbo16]

Indeed, Dominic Clegg's high speed crash at Assen was caused by him riding off the edge of the 120-60 tyre he had fitted.

[Jamcoly]

I use a 70 profile on the road
even with the rear end jacked up
i had to drop the bike on the forks about 5mm
to get the front end feel back, because of the taller tyre.

[Dominic Clegg]

use the 70 i used the 60 in first half of the season and ran out of tred at assen and had a big crash

[ali]

Originally Posted by Zimbo16

Indeed, Dominic Clegg's high speed crash at Assen was caused by him riding off the edge of the 120-60 tyre he had fitted.

Hate to contradict, but I don't suppose anyone in DD has ever ridden off the edge of a warm front tyre! Losing the front end can be caused by many things; too much braking/steering force, cold rubber, cold carcass and hot surface, too little suspension travel, too high tyre pressure, oil/coolant on track, debris on track, change in surface, etc, but the difference between a 60 and a 70 profile front is not going to help you in 9 out 10 instances.

The transition to a 70 profile front is only pretty recent for many racers (in other series) and people have been leaning other race bikes over a looooooong way for many years now without falling off the edge.

If you get the chance, try both. A 60 profile should give you a greater contact patch at the sort of lean angles you'll be riding in the wet, and a 70 should make the bike tip into corners a little easier (better in the dry). Given the state of our climate I wouldn't write one off in favour of the other just yet!

Cheers,

Ali

[Dominic Clegg]

i was running to the edge of it. Any way when i put the 70 in it also helped the bike turn a lot faster

[Chaz]

you can't argue with experience!!

[domski]

I ran a 70 all last season, then we started this season on a 60 - coz thats what was fitted from the showroom. Did Cadwell, Brands and Assen trackday on it and didn't really notice any difference (forgot it was a 60 actually).

However, I prefer a 70 - even it's psychological.

A racers head is as important, if not more important than anything else on the bike etc.

[fil2]

i have run both 60/70 profile in the last 2 years...and imho it makes no difference at all...................

as ali points out...there are arguments for both..!.......as for riding of the edge of the tyre.........................LMAO

[Rattler]

In theory its contact patch - in reality its mental!!!

Can we go race yet ????

[TP]

Well all ye non-believers ... when I ran the 60 profile, the tyre was worn all the way to the edge and the I slid the front more easily than on the 70.

When I used the 70 I've never gotten to the edge, there's always been a few mm left, and the tyre has only slid when the tyre was worn.

That was my experience FWIW

Bearing in mind that sliding the front is not necessarily just a result of speed, it can also be a result of how you're riding the bike.

Just my opinion