hi all,

i noticed my michelin rear trials tyre has a directional arrow, does this mean i cant rotate it to gain a sharper edge or do you find the directin doesn't mater?

thanks

Techincally yes but in reality no. I don't know anyone who does not rotate a trials tyre.

It's not wise on a road bike or car directional tyre but you'll be fine on a trialer.

agreed

As long as you are not going to get the bike MOT'ed as it will/should fail

As long as you are not going to get the bike MOT'ed as it will/should fail

Unless the writing gets buffed off, by rocks etc !

thanks for your replys

invest in a sealy tyre bead breaker, cost about £30

but you can spin a tyre in about 10 mins

jsp

I have been wondering the same thing and I would like to know why the tire is directional when the tread is identical

Some tires have a wrinkle wall that lets to tire flex or sort of collapse when driven in the correct direction adding traction

Drag race cars are a good example, my Tryall trials bicycle tires are another, it's very obvious when the tire pressure is low

I don't know if Michelin does this as well ?? Any tire experts on here?

The michelin has directional and a balancing mark (dot). The directional does not seem to have a purpose. If you are a top rider rotating the tire for a one day event does have a purpose. If you are rotating to extend tire life you are actually just wearing it out faster. Rotating the tire will wear the height of the knobs faster, which means you will need a tire sooner.

except we rotate our tyres so we have a sharpe edge.

except we rotate our tyres so we have a sharpe edge.

Ant thus the resulting question: Which edge is more important really?

It seems logical that surface area would relate to grip on acceleration?

in the uk riders generally rely on the sharp block edge for grip in wetter conditions once the edge is worn off the tyre aint much use hence the need for turning to regain that new edge the knob can be tall but no sharp edge its only good for practice ,, try rubbing your hand against an unworn edge then a worn edge you will feel the difference

I have been wondering the same thing and I would like to know why the tire is directional when the tread is identical

Some tires have a wrinkle wall that lets to tire flex or sort of collapse when driven in the correct direction adding traction

Drag race cars are a good example, my Tryall trials bicycle tires are another, it's very obvious when the tire pressure is low

I don't know if Michelin does this as well ?? Any tire experts on here?

I have been wondering the same thing and I would like to know why the tire is directional when the tread is identical

Some tires have a wrinkle wall that lets to tire flex or sort of collapse when driven in the correct direction adding traction

Drag race cars are a good example, my Tryall trials bicycle tires are another, it's very obvious when the tire pressure is low

I don't know if Michelin does this as well ?? Any tire experts on here?

I've always assumed that it's because of the joint in the fabric of the tire. Most tires (not Dunlop) are made of flat fabric so there is a joint where the fabric ends overlap. I've never heard of any one having a problem running one backwards though.