tire size
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Tourer
Joined: Apr 2010
Posts: 413
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From: canfield,ohio
tire size
I have a 2010 street glide with a 200/50/18 metzler 880 rear tire with only 7000 miles on it cupped real bad thinking about getting a dunlap 200/55/18 . what im wondering is what is the difference in the size and tires
Road Captain
Joined: Feb 2011
Posts: 670
Likes: 22
From: Umatilla, Fl
In theory you would have a taller tire. 200 is the widest part of the tire ( the section width, not the tread width), the 50 or 55 is the sidewall height in percentage. So a 200/50 would mean a tire 200 wide with a sidewall height of 100mm. A 200/55 would mean a tire 200 mm wide and a sidewall height of 110mm. Or 10% larger in overall diameter.
Club Member
Joined: Jun 2007
Posts: 45,429
Likes: 2,898
From: Bedford UK
In reality the fitted dimensions of any tyre can differ significantly from the stated size. As examples I have a 160 which measures 167mm wide on my wheel, but I have also had a 140 that measured only 139mm wide. So while the theoretical differences are easy to define, the actual sizes may not be the same!
To rework Rickl's figures, a 200/50 gives a sidewall height of 100mm, or rolling diameter of 23.87", while a 200/55 gives a rolling diameter of 24.66", which will theoretically raise the seat of your bike by around 3/8".
To rework Rickl's figures, a 200/50 gives a sidewall height of 100mm, or rolling diameter of 23.87", while a 200/55 gives a rolling diameter of 24.66", which will theoretically raise the seat of your bike by around 3/8".
Road Master
Joined: Dec 2008
Posts: 803
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From: Northern, NJ
Consider yourself lucky! I just put 5,850 miles on my rear 200/50 Metzeler 880 and it is SHOT!
I'm now looking to change brands and go with the Michelin Commander II's, but they only offer the rear in 200/55. I am concerned with possible rubbing under the fender going with the slightly bigger 55.
I'm now looking to change brands and go with the Michelin Commander II's, but they only offer the rear in 200/55. I am concerned with possible rubbing under the fender going with the slightly bigger 55.
Road Master
Joined: Dec 2008
Posts: 803
Likes: 0
From: Northern, NJ
My current rear is a 200/50ZR 17 and not very many manufacturers are making the 200/50 and matching 21 front. I've gone through 2 sets of 880's and at this point, I regret changing the rear rim from stock. I am almost at the point of buying the stock 2009 size rim and putting the original size tire back on, but I am running a 21 on the front and don't know if I will f'up the ride or have to change the suspension.
Last edited by shredsurf; Jun 1, 2015 at 05:25 PM.
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