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Post by Tim on Jun 2, 2020 8:11:45 GMT
What I think is poorer (?) is that the potential of a wallet melting bill isn't more clearly highlighted by the manufacturer. I take your point though Chris. I assume that different brands of tyre may have a different rolling radius - the 2mm suggested by BMW doesn't give much scope at all. IIRC, the received wisdom re tyres rolling radius differences was about 4mm f/r and side to side. That seemed absolutely tiny to me, given the potential differences from wear rates etc. Bonkers. When your tyres cost at least £200 each it does seem bonkers that you might have to throw away a pair that have plenty of life left in them when you replace the other pair. Or, on our shitty, potholed roads, you have to replace all 4 because one has been damaged. |
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Post by ChrisM on Jun 2, 2020 8:22:13 GMT
I'd have thought that the natural deformation of the tyre as you drive over bumps and into potholes etc would alter its diameter by more than 4mm
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Post by Boxer6 on Jun 2, 2020 17:54:16 GMT
IIRC, the received wisdom re tyres rolling radius differences was about 4mm f/r and side to side. That seemed absolutely tiny to me, given the potential differences from wear rates etc. Bonkers. When your tyres cost at least £200 each it does seem bonkers that you might have to throw away a pair that have plenty of life left in them when you replace the other pair. Or, on our shitty, potholed roads, you have to replace all 4 because one has been damaged. The Pirelli's I had on the Spec B. were over £200 a corner, and that was 10 years ago! Nothin after them came close price-wise. I'd have thought that the natural deformation of the tyre as you drive over bumps and into potholes etc would alter its diameter by more than 4mm Well yes, but then again that would be for a fraction of a second at most. |
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Post by Tim on Jun 18, 2020 9:16:41 GMT
Bugger
Drove the car last night and suddenly I have VERY graunchy brakes.
Had a look at the discs and there's a clear section about 1cm wide all round the face of the disc on each side that has a different wear pattern.
My car has the blue calipers, which I presume means they're Brembos, and inevitably appears to require the most expensive version of any brakes so, even if I do it myself, that looks like £4-500 worth of discs and pads needed pretty much straight away.
They won't be worth anything extra as a trade-in.
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Post by Roadrunner on Jun 18, 2020 10:31:24 GMT
Just put some pads on it and get it down the road ASAP.
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Post by Martin on Jun 18, 2020 10:33:07 GMT
Just put some pads on it and get it down the road ASAP. Exactly! No sense throwing money at it if you are going to change it soon. |
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Post by Roadrunner on Jun 18, 2020 10:37:34 GMT
Just put some pads on it and get it down the road ASAP. Exactly! No sense throwing money at it if you are going to change it soon. ... although this is not what I did with the Benz, having it serviced and fitted with four new premium tyres shortly before selling. I just couldn't bring myself not to treat the car as I always had done. This shone through at sale time and it sold instantly to the first viewer. |
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Post by Tim on Jun 18, 2020 11:31:03 GMT
Just put some pads on it and get it down the road ASAP. I considered that but it might have to stick around for a few months more before I actually change it - there are a couple of big projects going on at work and I don't want to commit to a new car and then get hit by some catastrophic failure in what we're trying to do |
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Post by johnc on Jun 18, 2020 12:42:15 GMT
Just put some pads on it and get it down the road ASAP. I considered that but it might have to stick around for a few months more before I actually change it - there are a couple of big projects going on at work and I don't want to commit to a new car and then get hit by some catastrophic failure in what we're trying to do If you have a good machine shop near you (and I am sure there will be one on Cupar), they could skim the discs for £50, put new pads on and you're sorted (as long as discs have enough meat left on them) |
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Post by Tim on Jun 18, 2020 13:18:43 GMT
I've been out and had a feel around - the discs are done, especially on the inside face. They've been there for at least 55k miles (as have the pads).
I've found some discs by a firm called Bremtech (no relation to Brembo) and they're £42 each plus Ferodo pads for £63 so just under £150 all in.
I wouldn't normally go for cheap stuff like this but in light of the current extremely low monthly mileage and the desire to sell the car fairly soon I'm sorely tempted.
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Post by johnc on Jun 19, 2020 7:40:07 GMT
I've been out and had a feel around - the discs are done, especially on the inside face. They've been there for at least 55k miles (as have the pads). I've found some discs by a firm called Bremtech (no relation to Brembo) and they're £42 each plus Ferodo pads for £63 so just under £150 all in. I wouldn't normally go for cheap stuff like this but in light of the current extremely low monthly mileage and the desire to sell the car fairly soon I'm sorely tempted. At that price it would be hard not to do it. Just remember that you need the bigger discs and pads. Have you checked here? www.eurocarparts.com/brake-discs |
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Post by Tim on Jun 19, 2020 7:57:54 GMT
Yeah I had a look there, £90 each for the disc.
I took the wheel off and the pads out last night.
Even after 55k miles both pads are, at most, 50% worn. but the wear is even.
The brake dust on the wheel now has a slight red tinge and I think there may be something built into the disc itself to show as a warning that its got to the wear point as wear indicators are usually a wire in the pad.
I was surprised at how much effort it took to get the wheel bolts fully undone. Normally once you've got past the initial resistance they come off simply but I had to lower the car back down again and use the long bar until they came off.
Thinking back it was my friends at John Clark who last had their hands on the car. Another reason not to darken their door ever again!
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