The complete automotive resource for buyers, sellers, and owners like you.
Car, Truck and SUV Forums at Roadfly
+ Bentley Forums
+ BMW Forums
+ Cadillac Forums
+ Chevrolet Forums
+ Ferrari Forums
+ Jaguar Forums
+ Lamborghini Forums
+ Lotus Forums
+ Mercedes-Benz Forums
+ Maserati Forums
+ MINI Forums
+ Porsche Forums
+ General Discussion
+ Marketplace Forums
Re: Diameter of standard vs. TRX's (archive)
[ Follow Ups ] [ 6-series (E24) Message Board ] [ Msg. Board FAQ ]
Posted by Tom K on April 29, 2000 at 06:50:43:

In Reply to: Diameter of standard vs. TRX's posted by Mark on April 28, 2000 at 15:37:45:

: I'm the guy who said do the math. I have a
: degree in math, so don't feel bad.

: The L6 TRX's had an overall diameter of 632mm.
: (The M6 actually had an OD of 631mm)

: The wheel you are suggesting has an OD of:
: 15*25.4 + 2*.6*225 = 651mm

: The setup you are being tempted by is about
: 20mm larger. That's 3/4 of an inch! I would
: not buy it.

: The M6 rims were over 16 inches. Your car
: had a rim under 16 inches. So it makes sense
: to pick a rim size in the middle; i.e., 16".

: Again the 225/50 ZR 16 diameter is exactly the
: same for all intents and purposes (631.4mm).
: I actually run a 245/45 ZR 16 in the rear in the
: summer.

: Now you have to worry about offsets. Your rim
: width was 165mm = 6.5 inches with ~21mm offset.
: You don't specify rim width and offset, and
: don't bother until you have 16" rim picked out.

How are you figuring this out? Would a 215/60/15 be a closer match? I'd like to stay with th 15" rims because of the price and would rather go with a slightly higher profile tire for ride. I baby the car so handling is a little less important.

Follow Ups:


[ Follow Ups ] [ 6-series (E24) Message Board ] [ Msg. Board FAQ ]
Questions, comments, or problems, please visit the Roadfly help desk.
Roadfly.com Logo © 1997 - 2008 Jump Internet Inc. All rights reserved.