04-09-2024, 11:10 PM | #1 |
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Weird Problems After Changing 20" Wheels to 21"
I just changed my 20” wheels to 21” 765M (X3MC) wheels.
I’ve noticed two things: 1. I have squeaks and groans when turning that weren’t there previously. Anything I can look at to see what is going on? 2. When reversing with the wheels turned all the way I get a weird bucking or locking up of the wheels. Almost like the diffs are locking up and having trouble. |
04-09-2024, 11:36 PM | #2 |
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Subbed since I’ll be doing this in a week or two, although with both sets being aftermarket
This is the first time I’ve seen a member have this issue tbh |
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04-10-2024, 01:37 AM | #3 | |
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2. I get this on my factory fit 21’s when turning at slow speed more so when the tyres are cold. It’s normal, it’s called the Ackermann effect. https://www.longacreracing.com/artic...t/Ackerman.pdf
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04-10-2024, 09:21 AM | #4 |
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Cant comment on the squeaks and groans.
Might be worth systematically spraying WD40 on suspension bushings one at a time and see if that's it. Might be a dry bush. I had a jag which drove me crazy with it. (obvious but have you checked wheel nut torque?) I get the ackerman effect with wheel skipping on certain surfaces going forwards and backwards with 20" wheels. |
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04-10-2024, 05:03 PM | #5 | |
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04-10-2024, 06:02 PM | #6 | |
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140nm or 103ft lbs is the correct spec.
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04-10-2024, 06:18 PM | #7 | |
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Also using a digital torque adapter so god knows how well that works. |
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04-10-2024, 06:29 PM | #8 | |
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A lot can be at play. My hf-5s are wrapped with ps4s and on a cold day if I happen to back out of a parking spot with full lock, I will feel the tire skip. With a slight counter steer, it goes away. After I warm the tires up and try to replicate the skipping again, its far less noticeable. What tires/size do you have on them? I believe with a wider and lower profile tire, this issue is more pronounced. I will test again after I get an alignment in the coming week. Edit: It would be more beneficial to use a dedicated wheel torque wrench. An adapter is fine for smaller applications but I personally wouldn't use it on lug bolts.
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2019 X3 M40i - MHD STG2 HPFP E40ish | MHD FlexFuel Kit | TU HPFP | xHP stg 3 | VRSF catless downpipe | MST intake | BMS occ | Verus turbo heat shield | P3 V3 gauge w/ P3 ESVA | FTP Charge Pipe | RossRacing PCV v1 VTA | MSS Springs | RES Exhaust w/o valves | Vossen HF-5 21x9.5/10.5 265/295 PS4S | Yellow DRLs | Paragon Rotors w/P3 pads | GTS Tail Lights |
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