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Hey guys,

I have Federal 595 SS tyres, 265/35/18 and tried getting them put onto my stock R34 GTR rims, however for some reason the tyres weren't fitting completely - part of the tyre was catching and wouldn't push over the inner 'lip' - the tyre guys put up to 80psi into the tyre to try and push it out, but still didn't work.

Does anyone know the reason for this, or has anyone had this problem before?

They thought they it might've been because the tyre had contracted slightly in the cold, and are going to put some heat through them to stretch them out, but are otherwise at a loss as to why this would occur.

Any help as to how to fix this would be greatly appreciated!

Yeah I was one of the people who couldn't get 595RS on R34 rims, they tried over 120psi to pop it on. There was at least one other person with the same problem.

On the other hand I do now have 595SS on those same R34 GTR rims....so get them to try a little more pressure ;)

The underlying issue is basically that both Nissan and Federal push the limits of "compatibility" in the angle of their rim edge and bead respectively because both were trying to get top performance....the issue shows when you try and put a very aggressive tyre on a very aggressive rim.

The shop I had fitting it had been doing tyres for 50 years and had never come across the issue (some tyres need more pressure, but they had not seen one they could not fit with enough pressure), and frankly if it hadn't happened to me I'd probably call bullshit :)

Ok thanks for the info and advice Duncan, I'll suggest 120psi but they were quite reluctant for obvious reasons (we were hiding behind machines at 80psi)

Perhaps if heating it up to make it stretch out a bit doesn't work, then 120psi could be pushed, but likewise with these blokes, they'd been doing it for over 30 years and never seen the problem before

Cheers mate!

umm yeah I should be clear....it is their tyre shop and their call on what they think is safe :) Don't just trust some nobody on the internet.

You could also get them to contact Federal's office, and in particular Mick Hart from Canberra...he knows the story and has had one of their techs look into this previously

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