Challenger - largest rear wheel tyre rim combo?

raven68 · Post by **raven68** » Tue Apr 15, 14 7:42 am

Ok as a newbie to the forum I am going to ask the question that I hate when I see it from everyone else

Whats the largest sensible rear tyre/rim combination for the rear of a 1970 Challenger please?

We definately need to fill out the rear a bit more on ours..... cheers !

RobTwin · Post by **RobTwin** » Tue Apr 15, 14 8:04 am

Dave R should be able to answer this - I think he may have done once or maybe twice in the past

Pete · Post by **Pete** » Tue Apr 15, 14 8:07 am

A lot depends on the rear spring arrangement - whether they are in-boarded or Super Stock type as it impacts on the diameter and width tyre you can use....wheel choice and off-set has a huge impact as well..........

Dave-R · Post by **Dave-R** » Tue Apr 15, 14 9:03 am

If you are talking stock suspension on 15 inch wheels you are looking at a 275 tyre on a 8 inch wide rim on the rear. 235 on a 7 inch on the front.

4.5 inch backspace I think from memory.

Dave-R · Post by **Dave-R** » Tue Apr 15, 14 9:05 am

You can go wider with taller wheels and low profile tyres. Or by making some small modifications.

raven68 · Post by **raven68** » Tue Apr 15, 14 12:16 pm

Dave wrote:If you are talking stock suspension on 15 inch wheels you are looking at a 275 tyre on a 8 inch wide rim on the rear. 235 on a 7 inch on the front.

4.5 inch backspace I think from memory.

Ok Cheers Dave - I'll work around those parameters and use one of them wheel / tyre comparison webpages if I want to go larger rims / low profile tyres, etc.

Dave-R · Post by **Dave-R** » Tue Apr 15, 14 12:28 pm

I think Drew uses 17 inch rims and 275 rubber on all four corners of his 1970. But he had to make some minor mods to the arches I think?

Adrian Worman · Post by **Adrian Worman** » Tue Apr 15, 14 1:16 pm

I use a 9"x18" wheel with 4.5" backspace and a 285x40 tyre on the rear of my Challenger. Plenty of clearance all round

drewcrane · Post by **drewcrane** » Tue Apr 15, 14 1:19 pm

Dave wrote:I think Drew uses 17 inch rims and 275 rubber on all four corners of his 1970. But he had to make some minor mods to the arches I think?

Yea a hammer and a block of wood will make room

raven68 · Post by **raven68** » Tue Apr 15, 14 9:06 pm

Adrian Worman wrote:I use a 9"x18" wheel with 4.5" backspace and a 285x40 tyre on the rear of my Challenger. Plenty of clearance all round

Got any pics then ?

BUDGIE · Post by **BUDGIE** » Wed Apr 16, 14 12:21 am

Col .........here are a set of 17" and 18" on a Chally i had .......

Not all approve but I like the look .........

Sorry Ade ......

BUDGIE · Post by **BUDGIE** » Wed Apr 16, 14 12:25 am

TBH the rear tyre was a little to narrow .........

Adrian Worman · Post by **Adrian Worman** » Wed Apr 16, 14 11:33 am

Yeah I remember that one shag, see it at the yard just after graphics and wheels went on, nice car

Here's my poor effort

raven68 · Post by **raven68** » Wed Apr 16, 14 10:48 pm

BUDGIE wrote:TBH the rear tyre was a little to narrow .........

I can see what you mean but the general look of those wheels looks good to me... Do you recall the width of the rear rim and that tyre?

BUDGIE · Post by **BUDGIE** » Wed Apr 16, 14 10:58 pm

raven68 wrote:
BUDGIE wrote:TBH the rear tyre was a little to narrow .........
I can see what you mean but the general look of those wheels looks good to me... Do you recall the width of the rear rim and that tyre?

T'was a 9.5" ..........the rubber from memory was a 275 x 40 x 18