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Author: Subject: Difference between Track Day Tyres and Road Tyres
ChrisJ15

posted on 13/4/24 at 08:11 AM Reply With Quote
Difference between Track Day Tyres and Road Tyres

Hi, I have a J15 which has Yokohama Advan A048s all round which are getting a bit old and perished so need replacing.

I cant replace like for like as these tyres aren't E rated anymore.

Because they are 195/60R14 rear and 185/55R14 fronts I'm finding it really difficult to find an equivalent track day tyre. The only one I can find in that size are Dunlop Direzza which are quite expensive (160ish each).

I dont plan to do a huge amount of track days so my question is, whats the difference between a reasonable road tyre and a track day tyre on a circuit? I know its a very open question but is there a massive difference between the two when just going for some spirited track day fun?

Probably worth adding the car is only 500Kg and is 200bhp.

[Edited on 13/4/24 by ChrisJ15]

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JoelP

posted on 13/4/24 at 06:59 PM Reply With Quote
I've been looking in to tyres recently. To be honest, 160 doesn't seem too bad, considering these cars don't seen to ever wear their tyres out. I'd be tempted to just get the best grip, even if you don't really need it on the road. Obviously weigh that up against the reality that you might actually need some wet performance in normal use, rather than a few pretend treads to satisfy the law!





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bi22le

posted on 13/4/24 at 11:30 PM Reply With Quote
No sure what their cost is but I would look at R888R. I am pretty sure they are road legal with E stamps.

They are a very capable track day tyre, fine on the road. Crap in the wet, but you wont get a decent dry track tyre which is also good in the road grease rain.

The only comprimise is they "only" do 185 60 R14 , not a 195. Buy the 185 and I bet you wont notice the 10mm tread width.





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ChrisJ15

posted on 14/4/24 at 08:06 AM Reply With Quote
Frustratingly the R888s aren't available in a 55 profile for 14" rims. Car looks a bit odd with the taller profile on the front.

I cant find an road tyres at these sizes so looks like its the Direzzas!

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obfripper

posted on 14/4/24 at 03:00 PM Reply With Quote
There is the mrf zrt and the yokohama a052 available in your front size, the mrf zrt seems to have good reviews and is used as a control tyre for the mx5 race series, and the a052 is the road legal replacement for the a048r, these might be worth a try if the prices are right.

Dave

[Edited on 14/4/24 by obfripper]

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loggyboy

posted on 15/4/24 at 01:24 PM Reply With Quote
Did a back to back test at Blyton on 3 sets of tyres. Mich PS2 road tyres, Yoko AD08R fast road then Yoko A048 race tyres (comp only), and dry performance confirmed as night, dusk and day. A small step between PS2 and AD08R, but noticeable, and massive more grip in the A048, which whilst being the competition versions, they were on a par with the road legal race tyres ive used before (A042 and Avon ZZR)
What is also night and day is wet performance, whilst damp is a performance level for any treaded tyre (as is more about heat than tread), full wet with standing water, IMO and IME you dont want to be out on road or track in anything thats not either a normal treaded road tyre or a intended track wet/intermediate.
So if its less about comparing track to road tyres as comparing how likely you are to be out on the road in the rain.





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ChrisJ15

posted on 16/4/24 at 06:55 AM Reply With Quote
quote:
Originally posted by loggyboy
Did a back to back test at Blyton on 3 sets of tyres. Mich PS2 road tyres, Yoko AD08R fast road then Yoko A048 race tyres (comp only), and dry performance confirmed as night, dusk and day. A small step between PS2 and AD08R, but noticeable, and massive more grip in the A048, which whilst being the competition versions, they were on a par with the road legal race tyres ive used before (A042 and Avon ZZR)
What is also night and day is wet performance, whilst damp is a performance level for any treaded tyre (as is more about heat than tread), full wet with standing water, IMO and IME you dont want to be out on road or track in anything thats not either a normal treaded road tyre or a intended track wet/intermediate.
So if its less about comparing track to road tyres as comparing how likely you are to be out on the road in the rain.


Thats a really good point. I only have an aero screen so no desire to be out in the rain but have noticed significantly less grip even on damp roads.

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cliftyhanger

posted on 16/4/24 at 07:56 AM Reply With Quote
quote:
Originally posted by ChrisJ15
quote:
Originally posted by loggyboy
Did a back to back test at Blyton on 3 sets of tyres. Mich PS2 road tyres, Yoko AD08R fast road then Yoko A048 race tyres (comp only), and dry performance confirmed as night, dusk and day. A small step between PS2 and AD08R, but noticeable, and massive more grip in the A048, which whilst being the competition versions, they were on a par with the road legal race tyres ive used before (A042 and Avon ZZR)
What is also night and day is wet performance, whilst damp is a performance level for any treaded tyre (as is more about heat than tread), full wet with standing water, IMO and IME you dont want to be out on road or track in anything thats not either a normal treaded road tyre or a intended track wet/intermediate.
So if its less about comparing track to road tyres as comparing how likely you are to be out on the road in the rain.


Thats a really good point. I only have an aero screen so no desire to be out in the rain but have noticed significantly less grip even on damp roads.


I am more of an enthuastic trackayer rather than particularly skilled, and use a comparatively inapporopriate car (spitfire but st170 poweed)
I thought about some bespoke TD tyres, but as I drive the car to and from the track, and that can be 200 miles, I have no way of transporting a spare set of wheels. And given some of the rain I have experienced on some events, I am glad I opted to stick with road tyres. Add to that the vast majority of t=driving I do is touring. This year got a castle combe td in early May, off the Spa for teh classic, including a single 20mins on track. Then off to Ireland with friends, and in Sept a 3K tour of europe down to the alps and dolomites where the interesting roads are.

There is another perspective too. Are you going for the very fastest times? there was an interesting article a few years ago comparing TD v road tyres. The conclusion was that the road tyres were about 1-2% slower lap times, but more fun. I can't remember what car was used for the test, that may have had a bearing on the results. But worth a thought.

At present I am on Uniroyals which seem comparable to the Michelins I had previously.

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ChrisJ15

posted on 16/4/24 at 09:06 AM Reply With Quote
quote:
Originally posted by cliftyhanger
quote:
Originally posted by ChrisJ15
quote:
Originally posted by loggyboy
Did a back to back test at Blyton on 3 sets of tyres. Mich PS2 road tyres, Yoko AD08R fast road then Yoko A048 race tyres (comp only), and dry performance confirmed as night, dusk and day. A small step between PS2 and AD08R, but noticeable, and massive more grip in the A048, which whilst being the competition versions, they were on a par with the road legal race tyres ive used before (A042 and Avon ZZR)
What is also night and day is wet performance, whilst damp is a performance level for any treaded tyre (as is more about heat than tread), full wet with standing water, IMO and IME you dont want to be out on road or track in anything thats not either a normal treaded road tyre or a intended track wet/intermediate.
So if its less about comparing track to road tyres as comparing how likely you are to be out on the road in the rain.


Thats a really good point. I only have an aero screen so no desire to be out in the rain but have noticed significantly less grip even on damp roads.


I am more of an enthuastic trackayer rather than particularly skilled, and use a comparatively inapporopriate car (spitfire but st170 poweed)
I thought about some bespoke TD tyres, but as I drive the car to and from the track, and that can be 200 miles, I have no way of transporting a spare set of wheels. And given some of the rain I have experienced on some events, I am glad I opted to stick with road tyres. Add to that the vast majority of t=driving I do is touring. This year got a castle combe td in early May, off the Spa for teh classic, including a single 20mins on track. Then off to Ireland with friends, and in Sept a 3K tour of europe down to the alps and dolomites where the interesting roads are.

There is another perspective too. Are you going for the very fastest times? there was an interesting article a few years ago comparing TD v road tyres. The conclusion was that the road tyres were about 1-2% slower lap times, but more fun. I can't remember what car was used for the test, that may have had a bearing on the results. But worth a thought.

At present I am on Uniroyals which seem comparable to the Michelins I had previously.


Again a very good point. If I booked a track day and it rained a lot I probably would have to bin it on track day tyres.

I'm not looking for fastest lap times, just biggest smiles and you can argue that a little sideways action, allbeit slower, is more fun!

The car is so light with a very good power to weight ratio (400bhp/ton) that the laws of physics dictate that it will go around corners very quickly indeed anyhow, regardless of grip.

All good food for thought, many thanks for all the comments.

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ChrisJ15

posted on 21/4/24 at 09:51 AM Reply With Quote
I thought I'd go for Toyo Proxes CF2s as they are available for my preferred sizes but no-one has any stock! Seems there's a world rubber shortage - who knew!

I quite like Nankang NS-R2s (and read good things about them) but I can only get 185/60 R14 and 165/55 R14 so I'd drop 10mm on the rear and 20mm on the font. TBH when I look at the front the dust on the tyres suggests that the outer 30mm of tyre doesnt touch the road anyway and thats running tyres pressures all the way down to 12psi.

Just wondering if I'd notice the drop in the width with these? Only time I've felt it slipping round on the road in the dry is being a bit too generous on the power in 2nd (OK a lot then! ) coming out of roundabouts. Have never experienced oversteer or understeer with a neutral throttle while cornering.

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JoelP

posted on 21/4/24 at 02:23 PM Reply With Quote
You're facing the exact same problem as me Chris! Swapping to nsr2s would loose me roughly 12mm, and I've only got 50mm under my sump as it is! Hence why I'm tempted to move to 15s.





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JoelP

posted on 24/4/24 at 05:45 PM Reply With Quote
I ended up getting the nsr2s, in 185 60 14. I'll get some ar1s in 14 later in the year, and put them on different wheels. Then I can just swap as required.





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ChrisJ15

posted on 27/4/24 at 08:01 AM Reply With Quote
quote:
Originally posted by JoelP
You're facing the exact same problem as me Chris! Swapping to nsr2s would loose me roughly 12mm, and I've only got 50mm under my sump as it is! Hence why I'm tempted to move to 15s.


Are you talking about a drop in height (as you refer to only having 50mm under your sump)?

I'm talking about a drop in width. 10mm at the rear seems OK but it's the 20mm drop at the front that concerns me. It's a pity as I like the NS-R2s because of cost and hearing they are a bit better in the wet (eg. quite an open tread pattern for a track tyre).

One other question I'd value input on is for the NS-R2s and the Dunlop Direzza DZ03Gs there doesnt seem to be much choice of compound. Logically for a very light car you would go for the softest but for the NS-R2s they only seem to be available in 180 (described as 'street' and the DZ03Gs only R3 medium for the rear (195/60 R14) and H1 hard for the front (strangely).
Does anyone have any input as to the difference in these compounds for street/track use? Obviously if it's a question of getting heat into the tyres it's going to be difficult to achieve this on the road (officer! )

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JoelP

posted on 27/4/24 at 09:23 PM Reply With Quote
Yeah, the height is what bothers me. I'm not hugely bothered about the width.





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johnH20

posted on 29/4/24 at 06:02 PM Reply With Quote
IMHO the key thing is how you drive and your expectations of lap time/speed. My Cyclone has ( original ) Toyo 888s which are suprisingly ok in the damp but are a semi slick ( now no longer available I believe ) . I also used these on my Lotus Elise ( 300 kg heavier ) on both road and track. I now have another Elise on 'production' Yokohama tyres and to be honest they are no less fun on track and better all round road tyres. My take is that you do not need ultimate grip to have fun on track !
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