pow
Premium Member
Registered: 11th Sep 06
Location: Hazlemere, Buckinghamshire
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Well, got the old 16"s off with mismatched tyres on them, new 17" alloys with brand new uniroyal rainsports on.
They look fantastic, really please, but fucked off with how they drive:
Lost MPG's? Like 2-3 more than I should get, maximum of 53 when I was getting 56-7 on a run, even had it down to 29.7 round town today  - is this normal on new tyres? should it get better say 1k down the line? I had 205/45/r16 on there before, gone to 205/40/r17, so surely shouldnt loose 3 mpg becuase of that?
Also, after aving the tracking done 3 times now, It is still pulling to the left - like having to hold the wheel 10 degrees to the right to hold the car straight - do I have to live with this? The toe (I think that is right) is "out" to me as well, the front wheels point / \ - one more than the other as well/
Once again, if you are just gunna come in here and bang on about how MPG is uncool, don't bother.
Any ideas please 
[Edited on 12-10-2008 by pow]
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mattk
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Registered: 27th Feb 06
Location: St. Helens
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my car pulls to the left despite the tracking being bang on, may have just been the road you were on, my MPG has gone shit now to, I have a mixed average of 42 now 
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Mattb
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Registered: 2nd Feb 03
Location: Under your sisters bed
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Wheels will be heavier and the rolling radius slightly bigger.. that will be where the few mpg are going..
As for the pulling to the left, have you had just tracking done or a full 4 wheel alignment?
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ChazSXi
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Registered: 26th Jan 03
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mpg is uncool...hmm new tyres shouldnt reduce mpg that much tbh
id say itsthe new radius of the wheels meaning u need that littke bit more th get it moving. long run it should be ok, if not better.
Weird its pulling to the left tbh. probably as the car now has a wider track it falls to the camber of the road easier? they wheels/tyres get balanced properly?
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l15ter
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Registered: 1st Feb 08
Location: Berkshire
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is there a difference in weight of the wheels?
also you tracking shouldnt be like that, has it been to the same garage to do it?
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pow
Premium Member
Registered: 11th Sep 06
Location: Hazlemere, Buckinghamshire
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Not really in the weight, theres "less of" the Leon alloys, they are only an inch bigger as well, If'd i'd gone from 14"s to 17"s fair play, but i've gained half an inch if that in rolling radius?!?
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Colin
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Registered: 4th Apr 02
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57mpg on a run  wtf I get 52 MAX cruising for 150 miles with the cruise control on doing 70!
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mattk
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Registered: 27th Feb 06
Location: St. Helens
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most I ever aim for is 50mpg in mine I have to use my right foot though so its hard to maintain a constant speed, I wonder is it the mirical shell v-power diesel giving you the edge
shit this is turning into another MPG thread
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pow
Premium Member
Registered: 11th Sep 06
Location: Hazlemere, Buckinghamshire
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I've had 62 on a run, set on 70 before, on the 16s.
The golf is heavyer, and your rolling on 18's arent you?
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ChazSXi
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Registered: 26th Jan 03
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ive hit 60mpg in the passat. normally sits around 53/54 tbh
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Tommy L
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Registered: 21st Aug 06
Location: Northampton Drives: Audi wagon
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Pics of wheels on the car ffs
Couldn't imagine new tyres being the cause tbh. Alsi take into consideration different weather  Rolling radius may not be much different but it may effect it as might the weight.
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pow
Premium Member
Registered: 11th Sep 06
Location: Hazlemere, Buckinghamshire
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Thanks chaz, but enough about the MPG. the fact is I've lost it over half an inch of wheel
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Colin
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Registered: 4th Apr 02
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quote:
Originally posted by pow
I've had 62 on a run, set on 70 before, on the 16s.
The golf is heavyer, and your rolling on 18's arent you?
This is true, still seems like LOTS more, I generally get 48mpg-ish driving mostly motorways 70 & above not really caring about mpg. 
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pow
Premium Member
Registered: 11th Sep 06
Location: Hazlemere, Buckinghamshire
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Just worked it out, I've gain 5mm in the overall size of wheels/tyres, but then I have another 8mm of tread on top of that...
Thats .2 of an inch i've gained. Might have a look at the weight...
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ChazSXi
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Registered: 26th Jan 03
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quote:
Originally posted by pow
Thanks chaz, but enough about the MPG. the fact is I've lost it over half an inch of wheel
the drag for gettin the wheels moving is what it is i bet....ur tracking needs sorting. none of the wheels r buckled r they? balance properly?
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pow
Premium Member
Registered: 11th Sep 06
Location: Hazlemere, Buckinghamshire
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I think so, I'm really scared to have it all done again though.
Where do I take it? 2 differentl places have had it now
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ChazSXi
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Registered: 26th Jan 03
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quote:
Originally posted by pow
I think so, I'm really scared to have it all done again though.
Where do I take it? 2 differentl places have had it now
get wheels straight. remove steering wheel, place straight n bolt back on...bham...it runs straight 
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corsa-sxi
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Registered: 11th Jul 03
Location: Kingston upon Hull
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when i had 2 new front tyres my tracking was out, but i put 2 new rear tyres on couple days later and everything was fine, so strange lol
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pow
Premium Member
Registered: 11th Sep 06
Location: Hazlemere, Buckinghamshire
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But when one wheel is straight, the other isnt mate, thats the point!
I'll get pics tomorrow
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1_Litre_Porsche_Beater
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Registered: 9th Apr 02
Location: Kent
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are you really that worried by 2-3 mpg? 10-12 i'd understand you asking questions but thats just petty IMO
Enjoy your car, its nice so dont worry about the loss its minimal.
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Mattb
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Registered: 2nd Feb 03
Location: Under your sisters bed
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they toe in as standard anyway iirc around 0.05 degrees +/- 0.05..
was it just tracking or a full alignment? there are other factors that can cause pulling
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Conway563
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Registered: 7th Jun 06
Location: Yate, Bristol
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How the hell do you manage to get 56-57 Pow.
I was trying to drive sensibly today and only managed 50
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pow
Premium Member
Registered: 11th Sep 06
Location: Hazlemere, Buckinghamshire
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I don't know, there was a machine on each wheel, then alot of messing around with a bolt just behind each of the front arches.
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corsasriboy
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Registered: 23rd Mar 07
Location: leicestershire
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if your tracking is out you will lose mpg through that due to increased resistance with one wheel trying to go a different direction to which you are travelling.
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Mattb
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Registered: 2nd Feb 03
Location: Under your sisters bed
User status: Offline
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did you get a print out?
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