Al N. Posted November 25, 2009 Share Posted November 25, 2009 Anyone? Anyone? Also, the ACB9s weigh 10 lbs less than the CR6ZZ...should I care? Link to comment Share on other sites More sharing options...
yellowss7 Posted November 25, 2009 Share Posted November 25, 2009 10 pounds a tire? or 10 pounds in total? Big difference. Al, I just talked to a guy who has his uncles Lotus 7 from the early 60s, and hasn't had it out in over 30 years. I may go take a look at it. I may want to talk to you about the restoration of yours. Happy Thanksgiving Tom Link to comment Share on other sites More sharing options...
Al N. Posted November 25, 2009 Author Share Posted November 25, 2009 Tom- Can you shoot me your home address to al at Mintadv dot com? I think the difference is 10 lbs a tire. Happy happy to you, too. Very interested in the specs of the vintage 7...I've nerded out a bit on all the vintage stuff and would love to chat. Mine won't be John Watson perfect, but it will have to do.... Link to comment Share on other sites More sharing options...
andrew7 Posted November 26, 2009 Share Posted November 26, 2009 Hi Al, I also looked at those tires for my car since I was doing 13" and wanted the lightest for rotational weight. I was discouraged when I found out they are easy to puncture and prone to tramlining. They are 10 pounds total, where my A048s are 16 pounds with the 5/32 tread depth. My steel wheels are just under 12 pounds and I think the Kodiak Aluminum racing wheels are 8 pounds but about $300 each. I went from 32# to 28# per wheel and it was a jump in performance. Just some numbers for you to crunch. Link to comment Share on other sites More sharing options...
Sean Posted November 26, 2009 Share Posted November 26, 2009 (edited) From the data sheets I have found, and comparing the two closest similar sizes: ACB9 in 6.5/23.0-13M size (165mm) weigh 15 lbs per tire CR6 ZZ in 175/70HR13 size (6.9") weigh 21 lbs per tire So with ACB9s, 6 lbs/corner weight savings over the CR6 ZZs; 24 lbs total weight saved (unsprung), plus your wallet will weigh that much less too. NOTE: The ACB9s are also available in 5.0/22.0-13M size, listed at 12 lbs per tire, but that is a significantly narrower tire. Source: ACB9 data sheet (scroll down) CR6 ZZ data sheet Don't recall hearing from anybody who has used either one, though. Edited November 26, 2009 by Sean Link to comment Share on other sites More sharing options...
slomove Posted November 26, 2009 Share Posted November 26, 2009 (edited) Not sure how you want to use them. If the ACB9 are anything like the ACB10 (both bias ply) I would not recommend them for road driving. While great on the track, the tramlining on regular roads is a bit disconcerting. But light indeed. My 7" ACB10 are something like 10.5 lbs (IIRC) Edited November 26, 2009 by slomove Link to comment Share on other sites More sharing options...
Al N. Posted December 2, 2009 Author Share Posted December 2, 2009 Road use. The wobblies I just bought have a UPS shipping weight (in box) of 10 lbs, so I think I can afford the extra weight of the cr6zz, especially considering the negatives you all describe. Not DOT, either, but when has that stopped anyone from being foolish! Link to comment Share on other sites More sharing options...
pierats Posted December 3, 2009 Share Posted December 3, 2009 What is the difference between the ACB9 and the ACB10? Link to comment Share on other sites More sharing options...
slomove Posted December 3, 2009 Share Posted December 3, 2009 You probably know the ACB10 as a slightly grooved "almost slick". The ACB9 is a fully treaded tire: http://www.rogerkrausracing.net/files/34184191.pdf Link to comment Share on other sites More sharing options...
JeffC Posted December 3, 2009 Share Posted December 3, 2009 Wow, are those prices per tire?!! Link to comment Share on other sites More sharing options...
slomove Posted December 4, 2009 Share Posted December 4, 2009 Wow, are those prices per tire?!! Of course. The weight is inversely proportional to the price :ack: And the ACB10 are indeed very decent track tires. Link to comment Share on other sites More sharing options...
pierats Posted December 4, 2009 Share Posted December 4, 2009 Yep. Per tire. I understand the tramlining on ACB10's is not so bad. However, they really don't do well with standing water - which is understandable given their tread pattern. Link to comment Share on other sites More sharing options...
slomove Posted December 4, 2009 Share Posted December 4, 2009 Well, maybe a matter of getting used to. But when I drove them on the road for the first time (which I normally don't do) I thought something was broken. Normally, when I take the hands off the steering wheel the car keeps going straight ahead. But these tires follow every rut and crevice. On crowned roads they aim for the shoulder. Link to comment Share on other sites More sharing options...
slngsht Posted December 4, 2009 Share Posted December 4, 2009 Al, be sure to give Radial Tire in Silver Spring, MD a call to price your tires. Ask for Sam and mention usa7s Link to comment Share on other sites More sharing options...
pierats Posted December 30, 2009 Share Posted December 30, 2009 Gert, Did you change your alignment for bias tires? I think they are very sensitive to camber.... Link to comment Share on other sites More sharing options...
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