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Tyre clearance

Tyre clearance

Tyre clearance

(OP)
Can anyone tell me what minimum clearance I could get away with between the sides of a road trailer tyre and a frame. I have always worked with 25mm.
Thanks

RE: Tyre clearance

Sufficient so the tyre doesn't rub ponder

I would guess that 25mm would be a reasonable minimum allowing for a bit of sway etc in the suspension.  

RE: Tyre clearance

It depends a lot on the suspension. With a tight suspension with little toe change and good lateral location, 1" should be OK.

With dual axles, load sharing loose bushes and long travel, 50mm might be required.

Regards

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RE: Tyre clearance

I have a bog standard (=bone stock for our colonial cousins) B5 Audi S4 and I can't get a small finger between the tyre and the suspension upright so clearance is about 10mm

RE: Tyre clearance

Most trailers have primitive suspension with poor axle location. I suspect your Audi has a somewhat better suspension with accurate axle location.

Regards

eng-tips, by professional engineers for professional engineers
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips Fora.
 

RE: Tyre clearance

That's probably 3mm tolerances and 7mm tire growth.

The tire to frame clearance also needs to include lateral compliance of the suspension and a much bigger tolerance stack, 25 sounds good to me.

 

Cheers

Greg Locock

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RE: Tyre clearance

(OP)
Thanks Guys

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