|
|
|
07-20-2015, 09:39 AM | #1 |
Private First Class
20
Rep 116
Posts |
Help! something changed on my rear wheels...
Hi,
On saturday I changed the rear tyres, I replaced the original Bridgestone with Goodyear F1 Assymetric 2 RFT. Both have the same specs... I also did alignment (front and rear) and balance the 4 wheels. When I took the car to the highway I did the test I always do pushing the wheel hard from side to side (like the racing cars do when they want to heat up the tyres). I was used to feel like the car was on a rail, rear tyres copied front tyres instantly. Now its seems like the rear suspension is softer... I took the car to align again today but I feel the same... Its like riding a Jetta, not a sporty 135i... Any thoughts? Thanks! |
07-20-2015, 09:51 AM | #2 | |
Lieutenant
35
Rep 504
Posts |
Quote:
__________________
2008 BMW 128i
2022 BMW 330e |
|
Appreciate
0
|
07-20-2015, 10:36 AM | #4 |
Colonel
868
Rep 2,304
Posts |
Well super low miles so nothing should be broken or worn out.
Two things were changed, tires and alignment. Alignment checked twice so maybe issue is tires, even tho new. Do you know anyone with another set of tires mounted on rims, even snow tires that could be swapped in? Can you recover your old tires, mount them again? Do you know anyone else with a 1 series? Have them drive your car to see if there really is an issue. Check the side walls of the new tires very carefully looing for bumps, bulges or anything not normal. I'm thinking you have 1 bad tire (even tho brand new). |
Appreciate
0
|
07-20-2015, 10:45 AM | #5 | |
Private First Class
20
Rep 116
Posts |
Quote:
Before they mounted them I checked them and I didnt find anything wrong... I will check again or take tthe car to the dealer again to take the tyres off and check them on the inside... the year of fabrication of the tyres is 2014, they are new new. |
|
Appreciate
0
|
07-20-2015, 10:52 AM | #6 |
Banned
55
Rep 206
Posts |
Ok, different tires have different amounts of sidewall flex. Sounds like the new tires have more flex. Tires act as a spring too. What happened is with putting different tires on the rear you changed the spring rate. In this case to a softer one. By not having the front tires changed to the same ones those tires have a higher spring rate. If you want to see what I am talking about add 4 lbs. air to the rear tires to make them stiffer and take it out on the road. Really the only good answer is to put new front tires that match the rear now.
|
Appreciate
0
|
07-20-2015, 11:20 AM | #7 | |
Olmec's Temple Guard
80
Rep 217
Posts |
Quote:
http://www.tirerack.com/tires/tirete...e.jsp?techid=5
__________________
2010 135i 6MT Jet Black M-Sport
|
|
Appreciate
1
|
07-20-2015, 11:23 AM | #8 | |
Banned
55
Rep 206
Posts |
Quote:
|
|
Appreciate
0
|
07-20-2015, 11:46 AM | #11 |
Major General
4342
Rep 6,196
Posts |
Which one, there is a yellow dot and a red one, they mean different things.
|
Appreciate
0
|
07-20-2015, 12:51 PM | #12 |
Lieutenant
139
Rep 439
Posts |
New tires - normal. You've got a lot of tread squirm from all that new, fat tread and the mold release is still working its way off the tires.
That's why they tell you (should tell you) to take it easy the first 100 miles or so while they are breaking in. |
Appreciate
1
|
07-20-2015, 01:19 PM | #13 |
Private First Class
20
Rep 116
Posts |
thanks for all of your comments. I have already done 200 miles... I will wait 200 more miles to make any conclusion... But if I could take a guess I would go for the tyre flex, not the fat tread, etc. Fat tread, etc, makes the tyre slippery, the feeling I get is more of a suspension feel, more likely to fix with a couple more lbs of pressure.
My current pressure is F: 39lbs, R: 45lbs Thanks |
Appreciate
0
|
07-20-2015, 04:42 PM | #15 |
Major General
51262
Rep 7,235
Posts |
|
Appreciate
0
|
Post Reply |
Bookmarks |
|
|