another offset question - sorry
03-27-2010, 08:13 AM
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My Ride: SOLD...Jet Black 2008 550i M Sport with SAT, black interior. RPI exhaust and air scoop, 35% huper optik tint all around, CF roundels, flat black kidneys, Springfield Armory XD-40 jet black in glove box, charcoal filter removed.
this was added to my "i just ordered new wheels" thread, but know that sometimes you all may not reread a thread you've already posted in or don't care to follow...so I pulled it out to make its own thread for some responses hopefully.
Can you guys help me understand this offset stuff...My current set up is stock 172's all around with 5mm spacers upfront and 15mm spacers in the rear. I'm wondering if my new wheels will need spacers or not to get an equivalent look or better to what I currently have on. To me, more of the wheel/tire poking out is good - less is bad.
I went to an offset calculator on the web, one I picked up from this forum at sometime I think, and it calculates the following regarding my new wheels,
Rears: Current are 19x9.5 with a 32mm offset. New forgestars are 19x10 with a 20mm offset. The calculator tells me that the new wheels will have 6mm more clearance on the inside and extend an extra 18mm on the outside.
Fronts: Current are 19x8 with either an 18 or a 20 offset (I've seen conflicting info on this for the stock 172's upfront). New forgestars are 19x9 with a 20mm offset. The calculator tells me that the new wheels (compared to an 18mm offset stock) will have 18mm less clearance on the inside and extend an extra 11mm on the outside. If I use a 20mm offset for the stock 172's, the numbers change to 13mm and 13mm.
So my question is, will this negate my need for spacers all together to get the same look I have now with 5mm spacers upfront and 15mm spacers in the rear? I mean won't the new rears stick out 3mm more than the stock ones with the 15mm spacer and the fronts stick out 6 or 8mm more than stock with a 5mm spacer (depending on stock offset of 18 or 20)?
I'm not so sure that the numbers can be compared like this. Maybe it is that simple? Anyone?
Oh, and in case you need it, this is the calculator I used http://www.1010tires...tCalculator.asp
Can you guys help me understand this offset stuff...My current set up is stock 172's all around with 5mm spacers upfront and 15mm spacers in the rear. I'm wondering if my new wheels will need spacers or not to get an equivalent look or better to what I currently have on. To me, more of the wheel/tire poking out is good - less is bad.
I went to an offset calculator on the web, one I picked up from this forum at sometime I think, and it calculates the following regarding my new wheels,
Rears: Current are 19x9.5 with a 32mm offset. New forgestars are 19x10 with a 20mm offset. The calculator tells me that the new wheels will have 6mm more clearance on the inside and extend an extra 18mm on the outside.
Fronts: Current are 19x8 with either an 18 or a 20 offset (I've seen conflicting info on this for the stock 172's upfront). New forgestars are 19x9 with a 20mm offset. The calculator tells me that the new wheels (compared to an 18mm offset stock) will have 18mm less clearance on the inside and extend an extra 11mm on the outside. If I use a 20mm offset for the stock 172's, the numbers change to 13mm and 13mm.
So my question is, will this negate my need for spacers all together to get the same look I have now with 5mm spacers upfront and 15mm spacers in the rear? I mean won't the new rears stick out 3mm more than the stock ones with the 15mm spacer and the fronts stick out 6 or 8mm more than stock with a 5mm spacer (depending on stock offset of 18 or 20)?
I'm not so sure that the numbers can be compared like this. Maybe it is that simple? Anyone?
Oh, and in case you need it, this is the calculator I used http://www.1010tires...tCalculator.asp
03-28-2010, 06:29 AM
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Your original assumptions are correct. The new wheels will be 6 or 8 mm more poked out in the front, and 3 mm more than the stock setup with the 15mm spacers.
You will probably be able to use the 5mm spacer in the rear only. The 15mm will likely rub without rolling the fenders. I think you will be happy how the new wheels look, even without the spacers.
Good luck!
You will probably be able to use the 5mm spacer in the rear only. The 15mm will likely rub without rolling the fenders. I think you will be happy how the new wheels look, even without the spacers.
Good luck!
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