BADASS of New England

An automobile club for the enthusiast who enjoys the last of the big GM cars. The rear wheel drive B and D bodys. Chevrolet Impala SS, Caprice, 9C1, Buick Roadmaster, Oldsmobile Custom Cruiser, Cadillac Fleetwood
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 275/60-15 Nitto 555 Extreme

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Posts : 57
Join date : 2011-07-17

PostSubject: 275/60-15 Nitto 555 Extreme   Sun Aug 14, 2016 1:09 pm

15's ! Now available in the states, my daughter got hers from TireBuyer. Vastly better than any other the same size from other manufacturers. Only in 275/60 in a 15".
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Posts : 226
Join date : 2009-01-24
Age : 43
Location : Wayne, ME

PostSubject: Re: 275/60-15 Nitto 555 Extreme   Sun Aug 14, 2016 1:54 pm

I've run 255/60R15 before and liked them. Same size at the impala ss 255/50R17.

How tall are the 275/60? Are they close to the 225/70R15? I have the 8" van rally wheels, so wider rubber would look good... but I don't want to have to reprogram the pcm for the speedo to be correct.
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Posts : 57
Join date : 2011-07-17

PostSubject: Re: 275/60-15 Nitto 555 Extreme   Sun Aug 14, 2016 2:04 pm

275/60-15 is a 28" tall tire and is ideal on 8" wheels. You can used it on 7" wheels. The tire co. always say you need 7.5's but no one has a problem on a 7". On a 9C1 car in the rear you will find a 1/4" or up to 3/8" spacer between the wheel and hub will prevent tire rubbing on the frame. The 9C1 speedo is calibrated for a 28" tire (225/70-15) The spacer requires replacing the two rear hubs lugs with correspondingly longer studs. Cheap from Autozone and others, easy and widens your track 1/2 to 3/4" for a little handling uptick. Wide-Track flashback.
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