BNA - Australian Cycling Forums

by **winona_rider** » Tue May 13, 2008 2:21 pm

hey - i am just wondering how worn out my tyres are.
the website says GP4000's have "tread wear indicators" but i have no idea what these look like.... can anyone enlighten me?

by **Forum Ads** » Tue May 13, 2008 3:01 pm

by **sogood** » Tue May 13, 2008 3:01 pm

Two little round pits. When the surrounding rubber has worn down to the base of these pits, then it's considered worn.

by **winona_rider** » Tue May 13, 2008 3:20 pm

thanks dude - i'd noticed those before and just thought i'd chipped the rubber...
:oops:

by **DavidH** » Tue May 13, 2008 10:09 pm

Thanks for the tip. I thought they were a flaw in the tire. Didn't even occur to me how unusual it was for the same "flaw" to exist on both the front and rear tyre :oops:

by **mikesbytes** » Tue May 13, 2008 10:35 pm

What about the other method.... change the tyre when you can see the threads.

by **HAKS** » Wed May 14, 2008 9:44 pm

i was wondering what those 2 rounds pits were, now i know

by **uMP2k** » Thu May 15, 2008 9:57 am

Cannot find any on mine - must mean they are due for replacement :oops:

by **isitonu** » Sun May 18, 2008 5:36 pm

Can someone explain the need for the rotation direction arrow on these tyres please. What are the consequences of rotating in the other direction?

by **531db** » Mon May 19, 2008 10:42 am

isitonu wrote:Can someone explain the need for the rotation direction arrow on these tyres please. What are the consequences of rotating in the other direction?

No consequences as such, other than the tread pattern may not be optimised for traction or water dispersal.

by **wayno** » Mon May 19, 2008 10:58 am

isitonu wrote:Can someone explain the need for the rotation direction arrow on these tyres please. What are the consequences of rotating in the other direction?

The back tyre wears quicker so becomes flat. As the rear wheel gets flat wear mark I give it a switch to prolong life.

Slightly off topic, are their tyre wear indicators on Pro 2 Race tyres?

by **sogood** » Mon May 19, 2008 11:23 am

mikesbytes wrote:What about the other method.... change the tyre when you can see the threads.

It's a question of increasing risk on oneself and material economy. Thinning tyres equate with reduced puncture resistance, increased risk of traction loss, increased risk of sudden rupture.

by **531db** » Mon May 19, 2008 1:21 pm

wayno wrote:
isitonu wrote:Can someone explain the need for the rotation direction arrow on these tyres please. What are the consequences of rotating in the other direction?

The back tyre wears quicker so becomes flat. As the rear wheel gets flat wear mark I give it a switch to prolong life.

Slightly off topic, are their tyre wear indicators on Pro 2 Race tyres?

The direction of rotation of a bicycle tyre has absolutely nothing to do with wear rate!

by **wayno** » Mon May 19, 2008 2:24 pm

Woops misread question. Michelins don't have a direction of rotation.

by **mikesbytes** » Mon May 19, 2008 10:19 pm

sogood wrote:
mikesbytes wrote:What about the other method.... change the tyre when you can see the threads.

It's a question of increasing risk on oneself and material economy. Thinning tyres equate with reduced puncture resistance, increased risk of traction loss, increased risk of sudden rupture.

Ah, but less rubber will make the tyres faster

by **531db** » Mon May 19, 2008 10:28 pm

mikesbytes wrote:
sogood wrote:
mikesbytes wrote:What about the other method.... change the tyre when you can see the threads.

It's a question of increasing risk on oneself and material economy. Thinning tyres equate with reduced puncture resistance, increased risk of traction loss, increased risk of sudden rupture.

Ah, but less rubber will make the tyres faster

Lighter maybe, but faster - no!

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tread wear indicators on conti GP4000

tread wear indicators on conti GP4000

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