FASTdan

Can anyone tell me what the accepted allowance for radial run out on a new tyre would be?

I've had 2 new avons put on the front of my mondeo ST TDCI. I immediately noticed a slight vibration at 80mph and worse under braking from that speed. I took it back and they checked the balance and said nothing was wrong.

I have now had a dial indicator on the tyre and found a 1.5mm flat spot on both tyres. Passenger side flat spot covers about 1/8th of the circumference and the drivers about 1/4 so they are quite noticeable - with the rest of the tyre only deviating about 0.5mm max.

Both rims are spot on radially and axially. Likewise discs are within 0.1mm max (thought I'd rule these out whilst I was at it).

I'm struggling to find much info on actual values for run out so just wondered if anyone could clarify whats acceptable? I've seen 0.05" (1.27mm) quoted on one site.

Shings

Would you like some weak lemon drink to go with your anorak???

Joshy

i wouldent have thought it would be a problem as after a few hundred miles they would wear down high-spots, did you have the DI on the rim when it was mounted onto the hub?

havent seen to much about this subject so dont think its normally a concern

whats the point?

mrjenrst

if you can feel it the its too much. Sounds like it's possibly slipped a belt either way it needs replacing

FASTdan

Sorry did I put too many numbers in there for you?