Pro Race 1.2's On A 309 Beam

[GilesW 41]

Will they scrub?

 

Have 309 wishbones and rear beam.

 

Wheels are 7inch wide (standard speedlines are 6.5iirc).

 

ET 15 as well.

 

People's thoughts?

[rallyeash 155]

Probably be alright depending on how low.

I've got 7' 1.2's on my flat arch with a 1.9 beam and my mate has 7' speedline corse wheels on a gti with a 309 beam.

[GilesW 41]

It's lowish as its a track car. Not silly ghetto low though.

 

Is the 309 beam 2cm wider than the 205 isn't it?

[Tom Fenton 1,542]

I think it will be bloody tight but may go. Will depend on how square the tyre is. My car is 309 beam with 306 arms, plus extra +4mm per side, with 6.75" wheels. It just about fits with the plastic arch returns trimmed back to nothing.

[Henry Yorke 269 3 Cars]

205 beam here with ET8 6.75J wheels and my arches have been smoothed off at the back. As Tom said, tyre shoulder squareness profile makes a difference. Potentially easier on 195/45/15's too as opposed ot 195/50/15's.

[GilesW 41]

I think it will be bloody tight but may go. Will depend on how square the tyre is. My car is 309 beam with 306 arms, plus extra +4mm per side, with 6.75" wheels. It just about fits with the plastic arch returns trimmed back to nothing.

What off set Tom?

 

.25 inch is 6.3mm, so your 4mm spacer takes it to pretty much the same as the 7 inchers.

A048 tyres, which iirc are pretty square (195/50).

[Tom Fenton 1,542]

The 306 arms add another 9mm a side.

 

[dcc 855]

When I had my beam lowered (albeit on a very stiff rear end) it did rub with my 1.2's (205 beam) - you'll be 11mm wider than mine was, you'll end up shredding tyres and destroying arches tbh

 

I felt that this was too low so it came up about 30mm to match a new set of springs fitted to the front.

 

[GilesW 41]

Dcc - where you on 309 fronts too?

We're they ok?

 

So it's looking like people who run 205's with pro race 1.2's are only getting away with.it on 205 beam widths then??

[dcc 855]

I have a rj front end - its based on a 205 width

[Stu 18]

See, my stock 309 beam with a 195 tyre on standard speedlines scrubs on full load, and thats with my arch trims chopped back too

 

I'd even thought of swapping to a 185 tyre when i refurb the wheels to geat a bit more room...

[wicked 103 3 Cars]

I have 7J superleggera's, with spacers it comes down to ET17. (or ET22; not sure ) and it is really tight. My arches are also chopped back and the scrub on bumps if loaded. I have 195/45/16 Pzero Nero tires; not really 'square' tires. Running semi's is impossible. The car lowered a bit. (30-40mm).

 

I'm gonna modify my bump stops, to avoid the scrubbing...

Edited October 10, 2014 by wicked