JCW JCW Aftermarket Wheels
#351
#353
I measured the distance between the face of the cooper S brake disc to the inner spoke (66mm) with my 498 race spoke wheels prior to fitting bbk which may give you an idea of clearance required.
I had 499 cosmos wheels prior which had (47mm) clearance which meant a 20mm spacer was needed for those wheels
#354
Just installed Michelin 225-45-17 tires and everything fits fine even with the 3/4" wider track of new wheels. These 17" NM Engineering wheels are 8 lbs each lighter than the stock JCW track spoke wheels but the new tires are 3 lbs heavier than the stock 205-45-17 runflats, so the overall weight drop is now 5 lbs per wheel. That is still a big difference.
The larger diameter of the new tire should also compensate for the factory speedometer error which always showed the car going faster than its actual speed.
The down side is that the recorded fuel mileage will drop; the actual true fuel mileage won't change but it will now appear to be lower. Now if I drive 100 miles it should actually show 100 miles instead of a bogus 102, 103, or more. ........... but the plus side is that the warranty will last a few miles more!
Does anyone in Southern California want to buy some stock runflat tires with only 4000 miles on them?
The larger diameter of the new tire should also compensate for the factory speedometer error which always showed the car going faster than its actual speed.
The down side is that the recorded fuel mileage will drop; the actual true fuel mileage won't change but it will now appear to be lower. Now if I drive 100 miles it should actually show 100 miles instead of a bogus 102, 103, or more. ........... but the plus side is that the warranty will last a few miles more!
Does anyone in Southern California want to buy some stock runflat tires with only 4000 miles on them?
#356
Thanks for the info Sootyvrs! Will measure to see if I have the 66 mm clearance when the time come.
Generally speaking, when putting tires wider that the previous setup (also depending on tire compound) wouldn't you experience an overall loss in Mpg cause of traction and inertia. Wider tires would tend to grip more than a narrower tire (in theory) not sure, just a thought.
Generally speaking, when putting tires wider that the previous setup (also depending on tire compound) wouldn't you experience an overall loss in Mpg cause of traction and inertia. Wider tires would tend to grip more than a narrower tire (in theory) not sure, just a thought.
#360
To be honest i just tried to install the wheels to check about rubbing or other point of contact.. and seems everything is ok!!
Actually i'm using original 17" w winter tires...
I need to wait till april 15th, i cant wait...
#361
#365
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#368
Sorry, I missed it above....if I go with those eventually (because I absolutely love my stock JCW cup spokes), I was thinking 18" x 7.5" ET40. Unless 18" x 8" is all they have....what tire size are you running then? Offset? No rubbing, even if lowered? Doing my homework!
#372
Thanks...I was going to ask that again. Well, that setup appears to be the largest wheel & tire combo for the F56 JCW, unless you jump to the ACS 19" wheels.
I started a wheel & tire thread in early 2015 on the f56mini forum about how to make larger wheels & wider tires fit these cars. It's certainly not been easy getting answers has it? Thankfully, NM & TD stepped up to the plate! As I recall, a 235/35/18 tire size is a match for the original 205/40/18 tire OD, but that's just too much rubber!
I assume your clearance from the strut is very close but adequate right?
I remember you working on a proper fitmentnt for a long time, so congrats for leading the way for those of us following along!
Happy Motoring,
John
I started a wheel & tire thread in early 2015 on the f56mini forum about how to make larger wheels & wider tires fit these cars. It's certainly not been easy getting answers has it? Thankfully, NM & TD stepped up to the plate! As I recall, a 235/35/18 tire size is a match for the original 205/40/18 tire OD, but that's just too much rubber!
I assume your clearance from the strut is very close but adequate right?
I remember you working on a proper fitmentnt for a long time, so congrats for leading the way for those of us following along!
Happy Motoring,
John
Last edited by 02fanatic; 02-23-2017 at 05:59 AM.
#374