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Author: Subject: Trye size conversion charts?
Jon Ison

posted on 26/1/17 at 10:57 PM Reply With Quote
Trye size conversion charts?

I've searched and failed, does anyone have a link to a true size conversion chart?

What's the nearest equivalent to 210/550/13 for example?

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Andy D

posted on 27/1/17 at 07:49 AM Reply With Quote
If you convert the width and diameter sizes to inches you get approx. 8.25"(210) x 21.6"(550)

Using this chart:
https://tiresize.com/chart/

Closest I can see is 215/55R13

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jsims

posted on 27/1/17 at 09:03 AM Reply With Quote
This website is really useful:

http://www.rimsntires.com/specspro.jsp

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daniel mason

posted on 27/1/17 at 09:38 AM Reply With Quote
If your after sprint slick. A crossply maybe be better with your rear axle
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Jon Ison

posted on 27/1/17 at 10:49 AM Reply With Quote
quote:
Originally posted by daniel mason
If your after sprint slick. A crossply maybe be better with your rear axle


Stop putting 2&2 together, you will end up with 4.

Best place to purchase? If I'm going to do it may as well have decent boots 😀

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WallerZero

posted on 27/1/17 at 12:27 PM Reply With Quote
http://www.willtheyfit.com/

This is also very useful for seeing the difference between two size choices. Although it is aimed more at road tyres than slicks....





http://zachsgbszero.blogspot.co.uk/

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daniel mason

posted on 27/1/17 at 06:38 PM Reply With Quote
Keep an eye on uphillracers Jon.get some used crossplies off an early Jedi or similar as they had 6"front and 8" rear rims.
The later ones like mine have 7" front and 10" rear rims I think.
If you want new then BMTR are probably the best bet but they will be £900! And they'll last around 90 secs before starting to go off

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Andy D

posted on 27/1/17 at 07:10 PM Reply With Quote
quote:

If you want new then BMTR are probably the best bet but they will be £900! And they'll last around 90 secs before starting to go off



Holy cow! I saw some over on wscc for sale second hand a while back, where he'd paid £1100 for a set new.

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daniel mason

posted on 27/1/17 at 07:15 PM Reply With Quote
Wide radials are.
I think 195-530-13 front 250-570-13 rear are around £1k
Cross plies in jedi sizes around £900

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matt5964

posted on 27/1/17 at 07:53 PM Reply With Quote
http://www.willtheyfit.com/index.php?width=195&aspect=45&diameter=16&wheelwidth=6.5&offset=38&width2=205&aspect2=45&wheel_ size=16&wheel_width=6-5&offset2=38#isPage=1

Will this help?





Luego velocity XT 2.0ltr 221.3bhp 178.9lbft

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jeffw

posted on 27/1/17 at 08:46 PM Reply With Quote
I have a pair of 210/550 13 A15 Slicks in the garage, new Sept last year and have done 4 events. If they don't go on the front with the new wheels then they will be for sale, Cost me £550 the pair.






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Jon Ison

posted on 27/1/17 at 08:54 PM Reply With Quote
1st refusal please
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jeffw

posted on 27/1/17 at 09:16 PM Reply With Quote
Sure, you might want to be sitting down when we get round to a price.






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Andy D

posted on 28/1/17 at 10:25 AM Reply With Quote
Just out of interest, how many events do you get out of a set of sprint slicks before they (significantly) lose performance?
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daniel mason

posted on 28/1/17 at 01:00 PM Reply With Quote
I've used 3 season old ones until last year.
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jeffw

posted on 28/1/17 at 03:25 PM Reply With Quote
The top guys change tyres very frequently. Most have a new set at the start of the year and turn the previous years into Wets. But, with a light car, you can run them for several years if you look after them.






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phelpsa

posted on 28/1/17 at 04:52 PM Reply With Quote
They do seem to have a bit of additional bite for the first event or two, but after that they level off. Age makes more difference than number of events or wear past that point. Had a new set at the beginning of the season, 14 events of double driving later and they still managed a 128sec run of the 2 lap Blyton course. They still have a bit of life left in them, although they have very little tread depth left. I've actually found that more worn A15s still give the same cold temp performance but don't go off as quickly due to the reduced tread movement.

I've also run 2-3 season old ones that have done 3-4 events and they were noticeably worse despite being stored in the ideal fashion.

EDIT: Thats first hand experience having had 4 brand new sets and a couple of spare used pairs all in the same size / compound across 2 different cars.

[Edited on 28-1-17 by phelpsa]

[Edited on 28-1-17 by phelpsa]

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