qube 3570 Report post Posted December 18, 2015 Ive done a fair bit of googling but no definitive answer. I want to know if I can fit Bridgestone Potenza RE050A RTF on normal aftermarket wheels? I will only do this if it is 100% safe and okay to do. Thanks Quote Share this post Link to post Share on other sites
Michael. 2313 Report post Posted December 18, 2015 Should be fine. But RFT are horrible. Avoid 1 Quote Share this post Link to post Share on other sites
Matth5 471 Report post Posted December 18, 2015 Ask the rim manufacturer? Runflat does put extra stress on the rim, so if they're not strong rims they'll crack even more easily. Quote Share this post Link to post Share on other sites
Gaz 1061 Report post Posted December 18, 2015 Negative. RFT rims have two beads to stop the tyre coming off when it goes flat. WOF fail. 1 Quote Share this post Link to post Share on other sites
qube 3570 Report post Posted December 18, 2015 Negative. RFT rims have two beads to stop the tyre coming off when it goes flat. WOF fail. Ive read that some run flat tyres dont need to be mounted on special rims, some tyres do. hence i was asking specifically for the re050a rft's Quote Share this post Link to post Share on other sites
Herbmiester 928 Report post Posted December 18, 2015 The guys at BS wouldn't fit runflats to the standard rims of my E36. Quote Share this post Link to post Share on other sites
kiwi535 538 Report post Posted December 18, 2015 Yep the old rule was no but there may be newer generation run flats that do not require the specialist rim - Ring Bridgestone and talk to their technical guy it is his job to know , they are in Ellerslie, can't remember the number 0800 HARSH RIDE 1 Quote Share this post Link to post Share on other sites
Docile 64 Report post Posted December 18, 2015 i currently have bridgestone RFT on my car. its harsh and grip is not even anywhere i expected it to be. Quote Share this post Link to post Share on other sites
E30 325i Rag-Top 2959 Report post Posted December 18, 2015 The tyre, and the sidewall in particular, is a part of the overall suspension system. If the shocks / springs / geometry are not designed for RFTs then it's not going to work well. I would only suggest putting the tyres on if everything else is set up to work with them. Quote Share this post Link to post Share on other sites
Matth5 471 Report post Posted December 18, 2015 ...and even then they are still awful. Quote Share this post Link to post Share on other sites
Gaz 1061 Report post Posted December 18, 2015 Ive read that some run flat tyres dont need to be mounted on special rims, some tyres do. hence i was asking specifically for the re050a rft's If the tyres are ok, then you'll need to prove to the WOF inspector that they are otherwise you'll fail. Quote Share this post Link to post Share on other sites
E30 325i Rag-Top 2959 Report post Posted December 18, 2015 ...and even then they are still awful.In terms of.. Grip? Harshness? Noise? Lots of factors involved.I am running Potenza S001 with a 40 profile on the front and a 35 profile on the rear, and whilst I would agree they can be a bit noisy on the coarse chip I don't have an issue with how harsh they are. But then, I do like a firm ride. In terms of grip I have not found an issue and without trying to sound like Lewis Hamilton I would say they have been pushed harder than 80% of the tyres on road cars. Not sure if that helps Kyu, but they are Bridgestones, not sure where they sit in the range compared to the RE050s. Quote Share this post Link to post Share on other sites
kiwi535 538 Report post Posted December 18, 2015 i didnt have any issues with the grip of the tyres on the 120,and i have never ever had issues with grip on any car or bike i have owned.May be i actually drive slowly but if i do i still drive faster than most around corners .The tyres on the 120 were not low profile(bridgestones and contis when i bought it) ,and it wasnt motorsport suspension.But the ride was awful.On a smooth road you dont notice it of course but as soon as the road is uneven or the surface is broken up it was bad.Much much worse than the 235 45 17s on motorsport suspension on the 535.The pirellis i got later were better .But i paid 400 a tyre one xmas strangely much cheaper the second time.Dubiuos .i did get a flat once,the low pressure warning came on about a kilometre before my exit on the motorway,i kept driving at about 80 ks,and stopped as soon as i could.I would say the tyre was about 20 psi.Was a slow leak.However they wouldnt repair it.looked fine.So a new tyre,so then you have uneven wear around the car, i try to buy tures in pairs.If i could choose i would not have run flats again Quote Share this post Link to post Share on other sites
qube 3570 Report post Posted December 19, 2015 not really trying to start (another) debate about how bad runflats are. I just have some in the correct size and was wondering if i can mount them on the wheels I have. still dont have the answer i need so i will ask bridgestone. ps. wheels are breytons ((germany) so I would say they are of good quality, unlike some cheaper taiwanese aftermarket wheels Quote Share this post Link to post Share on other sites
E30 325i Rag-Top 2959 Report post Posted January 13, 2016 Suddenly thought about this thread the other day, when I remembered something that you probably know, but needs saying just in case. The car you put them on needs to have a tyre-pressure monitoring system of some sort to inform you if a tyre loses pressure (as you won't notice otherwise). Driving too long / too fast on a run-flat will result in a big blow out. FWIW, I have had a sudden loss of pressure with both types of tyre. The run flat I noticed a slight sluggishness to the steering, just as the warning came on the dash. The normal tyre I was pointing backwards down the motorway before I had time to blink, how I missed the barrier I'll never know. As a safety feature I find it well worth the slightly harsher ride. Quote Share this post Link to post Share on other sites
