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120/90 versus 110/90
- jklcycles
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- Avondale, AZ
1975 Z1-B. Current project.
1977 KZ1000. Future project.
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- Kawickrice
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- After Monday & Tuesday, even the calendar says WTF
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These bikes don't handle like a modern bike but going up a size or two wont hurt anything
73 Kawasaki Z1
07 HD CVO Ultra Classic
82 Suzuki GS 1100
74 Yamaha RD 350 (My two stroke toy)
77 Kawasaki KZ 650B-1 (My putt around bike)
80 Indian Moped (My American Iron)
1
Long Gone
75 Suzuki GT550
74 GT 380
79 RD 400 Daytona Special
72 Honda CL 175
74 Honda QA 50
Tampa FL
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- dragnkaw1428
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Andy
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- StreetfighterKz
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The wider the tire is on the same width rim, the more rounder the profile becomes and the less contact patch you will have.
Later, Doug
1978 z1000 Streetfighter
1976 z900 Stripfighter (work in progress)
1983 Gpz750 Resto-Mod
1989 Vmax
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- RonKZ650
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110/90-18-basically correct width, but low profile=reject
120/90-18-basically the right diameter but too wide=usable, but it isn't perfect for the wheel size.
130/90-18-much too wide for 2.15" wheel=reject
4.00-18-correct tire that works and looks correct-usable
321,000 miles on KZ's that I can remember. Not going to see any more.
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- dragnkaw1428
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Where do the specs call for a 110/90-18? Nowhere I've ever read. 4.00-18 is stock and no that is *not* a 110/90-18, not even close. Run a 120/90-18 for all practical purposes, but it will be too wide for the rim. Run a 130/90-18 and it is way to big for the rim. Here's pretty much the rundown on tires.
110/90-18-basically correct width, but low profile=reject
120/90-18-basically the right diameter but too wide=usable, but it isn't perfect for the wheel size.
130/90-18-much too wide for 2.15" wheel=reject
4.00-18-correct tire that works and looks correct-usable
I run a 130 80 18 not a 130 90 18
Andy
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- 650ed
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1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
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- RonKZ650
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RonKZ650 wrote:
Where do the specs call for a 110/90-18? Nowhere I've ever read. 4.00-18 is stock and no that is *not* a 110/90-18, not even close. Run a 120/90-18 for all practical purposes, but it will be too wide for the rim. Run a 130/90-18 and it is way to big for the rim. Here's pretty much the rundown on tires.
110/90-18-basically correct width, but low profile=reject
120/90-18-basically the right diameter but too wide=usable, but it isn't perfect for the wheel size.
130/90-18-much too wide for 2.15" wheel=reject
4.00-18-correct tire that works and looks correct-usable
I run a 130 80 18 not a 130 90 18
Don't matter if it's a 130/90-18 or a 130/20-18. 130 is still too wide to work with a 2.15" rim. I've run 120/90-18 for 200,000 miles or more, 130/90-18 a couple times=reject, 110/90-18 once=major reject. Stay 4.00-18 or if absolutely can't stand staying stock, stay 120/90-18 but still too wide for a 2.15" wheel. I have nothing against wide tires, get a 2.5"-3" wheel and go to town, but 2.15" no good trying to go wide.
321,000 miles on KZ's that I can remember. Not going to see any more.
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- jklcycles
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1975 Z1-B. Current project.
1977 KZ1000. Future project.
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