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difference in tire sizes? (Read 143 times)

Savage_Amusement

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difference in tire sizes?
06/22/08 at 08:43:04

I have been looking around at different tire options because I feel everyday that these stock IRC's are going to KILL me. I can not stand the way the perform or lack there of. I found some tires that I really like out there but we kind of have an odd rear tire size. What is the overall difference between a 140/80-15 and a 140/90-15? I see a lot more of the 90's out there for rear tires. I can find the front tires with no problem. Thanks for any help in advance.

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justin_o_guy2 Serious Thumper Offline What happened? Posts: 55279 East Texas, 1/2 dallas/la.	Re: difference in tire sizes? Reply #1 - 06/22/08 at 09:35:28 Im running the 140/90 on the rear. The IRC was always squirmy, never did feel secure. Lasted 5,000 miles, tho, then,I felt qualified riding on ice, cuz thats what the crappy IRC felt like. Get a tirre on that thing.
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verslagen1 YaBB Moderator ModSquad Offline Where there's a will, I want to be in it. Posts: 28884 L.A. California Gender:	Re: difference in tire sizes? Reply #2 - 06/22/08 at 11:56:36 140/90 is ok, just check your bike for clearance. There are a few bolt heads on the underside of the fender that if your tire is not centered will bite it.
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Paladin.

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Re: difference in tire sizes?
Reply #3 - 06/22/08 at 14:46:16

http://www.us.metzelermoto.com/en_US/browser/attachments/pdf/2008_METZELER_FU...
ME880 140/80-15 allowable rims 2.75"-3.75", measured on a 3.5" rim:
Maximum width 145mm (5.71") Maximum diameter 619mm (24.37")

http://www.dunlopmotorcycle.com/tirecatalog_tire.asp?id=37
D404 140/90-15 on a 3.5" rim: width 5.85" diameter 24.73"

http://www.maxxis.com/products/motorcycle/product_detail.asp?id=158
M6011 140/90-15 WW on a 3.5" rim: width 5.7", diameter 24.7"

http://www.motorcycle-karttires.com/glamourindex.aspx?productID=14
Bridgestone/Firestone G702 140/90-15 3.5" rim, 5.8" x 25.2"

The ME880 140/80-15 is the Nominally correct size. Going to 140/90's:

Maxxis is the same width and only 1/6th of an inch larger radius.
Dunlop the same 1/6" larger radius but .15" wider.
The Bridgestone is .2" wider and nearly a .42" greater radius!

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Toymaker Serious Thumper Offline Dragon Rider Posts: 1534 Granite Falls, NC Gender:	Re: difference in tire sizes? Reply #4 - 06/22/08 at 16:26:59 I have a150/90 on mine...here I thought it was stock...only to find it is oversize and throws my speedo off. oh well
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Educatedredneck Senior Member Alliance Member Offline Sometimes it's better to be lucky than good. Posts: 458 Hampstead, Maryland Gender:	Re: difference in tire sizes? Reply #5 - 06/22/08 at 20:45:19 Hey Toymaker - Did you have any clearance issue with the 150 tire? Other that the normal bolt issues?
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Toymaker Serious Thumper Offline Dragon Rider Posts: 1534 Granite Falls, NC Gender:	Re: difference in tire sizes? Reply #6 - 06/22/08 at 20:49:14 Nope...the only problem I have is when I 2-up. I had to put the shocks on the highest preload when my daughter and I ride together...but I am a little beefy...230 lbs. other than that....nope
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Savage_Amusement

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Re: difference in tire sizes?
Reply #7 - 06/22/08 at 22:16:33

Sweet thanks, I would have gotten back to you guys sooner but we were out on a Poker run for kids with Diabetes. That maxxis tire is exactly the one that I'm looking at. I knew it wouldn't be a huge difference but just wanted to make sure. I got my bike in late feb with 1600 miles on it and today I went over 4700 and the back tire is starting to look a little flat.

2K5, 1975 Sportster tank, blacked out motor, K&N cone, Much more to come later!!

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