CR500 vs. ACB10 ??
Discussion
I have only competed with my Busa engined 7 using crossply hillclimb super soft slicks & wets in the none road legal classes thus far.
Only tried the Kumho's for a few miles when I put a set on my R400 just before I sold it, as the previous CR500's were somewhat racked off!
As I say in the club championship, the top few classes run Kumho's & the feedback is overwhelmingly positive. The times the guys are doing tends to back that up too.
I am in the process of making my Busa road legal, & trying to fit in a few rounds of the club championship in class 5 this year as well as racing a Radical, hence sticking a set of Kumho's on it. Will report back when tried in anger!
Only tried the Kumho's for a few miles when I put a set on my R400 just before I sold it, as the previous CR500's were somewhat racked off!
As I say in the club championship, the top few classes run Kumho's & the feedback is overwhelmingly positive. The times the guys are doing tends to back that up too.
I am in the process of making my Busa road legal, & trying to fit in a few rounds of the club championship in class 5 this year as well as racing a Radical, hence sticking a set of Kumho's on it. Will report back when tried in anger!
interesting debate... would be lovely to have the facility and ££ to test all these tyres back to back on the same car, same track, same day - altering the set up to suit cross ply to radial obviously...
I do find the sizes of the 235/45/13 strange in terms of diamater though... 526mm is tiny campared to most, and strangely is 4mm less than the 215/50/13 front... obviously the car can be set up to run correct rake etc.. but becomes a pain when you fit more 'conventional' slicks or wets that are a fair bit larger at the rear..
Think i will test ACB10s initially, but may try Kumho's too at some point in the season...
I do find the sizes of the 235/45/13 strange in terms of diamater though... 526mm is tiny campared to most, and strangely is 4mm less than the 215/50/13 front... obviously the car can be set up to run correct rake etc.. but becomes a pain when you fit more 'conventional' slicks or wets that are a fair bit larger at the rear..
Think i will test ACB10s initially, but may try Kumho's too at some point in the season...
If anyone has the 235/45/13 actually mounted on a 10" rim, would you mind measuring the circumference in mm or inches please ??
although the technical folk at Kumho have told me their measurements are mounted on rims... i can't understand why they woudl make a tyre so much smaller than any other......
although the technical folk at Kumho have told me their measurements are mounted on rims... i can't understand why they woudl make a tyre so much smaller than any other......
thanks... are you using the Kumho's on the 8.5" rims on the same car that the 9.2/22/13 slicks on 10" rims ??
I have measured 9.2/22/13 avon slicks on 10" rims and they are quite a bit bigger than acb10s in 8/22/13 mounted up... so teh kumho would be quite a bit smaller again..
are you planning to run the kumhos on the busa caterham or the radical ??
I have measured 9.2/22/13 avon slicks on 10" rims and they are quite a bit bigger than acb10s in 8/22/13 mounted up... so teh kumho would be quite a bit smaller again..
are you planning to run the kumhos on the busa caterham or the radical ??
Yes, running the Kumho's on the 8.5in rims on the rear of my Busa Caterham for road use, just got to get round to doing the setup changes to the camber & ride heights to suit. I have only used the Dunlop slicks & wet on the Radical thus far.
I would imagine if you were planning on using the kumhos on the Radical you would be needing to go with the hard compound ones for racing or they would just get too hot in a couple of laps due to the high loading caused by the downforce & fall apart?
I would imagine if you were planning on using the kumhos on the Radical you would be needing to go with the hard compound ones for racing or they would just get too hot in a couple of laps due to the high loading caused by the downforce & fall apart?
Edited by dsl2 on Sunday 18th January 09:58
The Kumho ECSTA V70A is what we the Kumho BMW championship use, been a few years since I raced in that championship but they are very good tyres indeed, we used to have to use the Hard compound though and they'd last very well but were too hard for the wet IMO, medium or soft would be superb i would have thought
thanks guys...
just very intrigued as to why Kumho decided on the strange size of their rear ryres vs the competitors... i can only imagine they were made for aone make championship or something... very strange.
think i will stick to the plan to go acb10 and maybe look for a 'wet' road legal pattern that is similar in size that can be mounted onto wide-ish rims..
just very intrigued as to why Kumho decided on the strange size of their rear ryres vs the competitors... i can only imagine they were made for aone make championship or something... very strange.
think i will stick to the plan to go acb10 and maybe look for a 'wet' road legal pattern that is similar in size that can be mounted onto wide-ish rims..
medium is all we get here, I got my r888sg through demon tweeks and freighted over here it is the same we can only get mediums in just about all the differnt brands.
Iget the same think from all the supplyers that it is too hot in australia to use softs but they dont understand that the car is only 500 kg and i only have 4 laps to get the best heat and pressure in to them
Iget the same think from all the supplyers that it is too hot in australia to use softs but they dont understand that the car is only 500 kg and i only have 4 laps to get the best heat and pressure in to them
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