Old wheel swap comfirmed

[Guest]

Yes i know lots of folks have done this but now you can see why they do. super easy. Just use the 87 GSXR1100 (4 inch) wheel and a GS500 sprocket carrier. For me im still going to use 630 chain and just a 150 tyre.

Chain Alignment Specs.jpg

[thebrandonbeezy]

Man, I'd love to get a set of those old gsxr 1100 split tri spokes

[sharpy]

Man, I'd love to get a set of those old gsxr 1100 split tri spokes

Look around classic bike racing forums/ links. Some one mite be changing from 18 to 17 inch wheels if the rules allow and selling off there wheels/forks

[Chuck78]

Yup.



And they look very similar to a GS1150 3.5 inch rear wheel!

[Chuck78]

4 inch rim is perfect for a 150 for the best tire wrap and largest tread contact patch. You can also fit a 160 on there if you insist on bigger is better. 150 is the best fit, however. In a good quality Super grippy Tire, that should be all you need. Most modern sport bike tires are high-mileage compounds that only grip better due to a larger surface area. A 150 in a super sticky compound will have no compromise in grip over the 180 sport bike tires unless you are talking about hypersport racing compounds

[sharpy]

Current ride has 4.25 spoke wheel running a 140 tyre. Perfect for what that does so a more "rounded" tyre be just as nice for a touch more lean angle. Oh and hey chuck, what site you using to get that pic that big, since photo bucket wont allow any more. Thanks

[Chuck78]

I had run 140/70's then 150/70's on a 3.50x18 rear rim, and actually got the most tread contact patch of all when I swapped a BT45V Battlax in a 130/80-18 onto the same 3.50MT18 rim! Lighter tire, too, so more free horsepower!

The 150/70-18 looked the most appropriate of all however, but not the best choice on a 3.5 on an old school GS or Z1/KZ, as you can't really use the whole tread as your stator cover, footpegs, or exhaust will scrape before you get to the edge of the chicken strip on your tires, unless all those parts are modified and higher clearance racing exhaust nicely tucked in...
150 was definitely a more rounded profile with slightly less contact patch area as a trade-off of greater lean angle capability (*greater lean angle capability without considering mid pipe, stator cover, or stock footpegs scraping first)
18" wheels, proper height forks, and 1" taller rear shocks will definitely help you get closer to this extreme of lean angle, however. 17" wheels and shorter modern fork swaps will hurt this lean angle issue.

[thebrandonbeezy]

While we're talking about wheel swaps, what swinger is preferred when going for a 5.5?

[tas850g]

sorry i don’t have much to add to the question(s) however i have a 1995 GSXR 750 rear swing arm and front/rear rims for sale if anyone wants to try that swap.

[sharpy]

Dont they use bandit 1200 swing arms?

[kochic]

A 5.5 wheel fit fine in a gs1100 swingarm if you want to keep twin shocks.
Marc

[glib]

I had run 140/70's then 150/70's on a 3.50x18 rear rim, and actually got the most tread contact patch of all when I swapped a BT45V Battlax in a 130/80-18 onto the same 3.50MT18 rim! Lighter tire, too, so more free horsepower!

The 150/70-18 looked the most appropriate of all however, but not the best choice on a 3.5 on an old school GS or Z1/KZ, as you can't really use the whole tread as your stator cover, footpegs, or exhaust will scrape before you get to the edge of the chicken strip on your tires, unless all those parts are modified and higher clearance racing exhaust nicely tucked in...
150 was definitely a more rounded profile with slightly less contact patch area as a trade-off of greater lean angle capability (*greater lean angle capability without considering mid pipe, stator cover, or stock footpegs scraping first)
18" wheels, proper height forks, and 1" taller rear shocks will definitely help you get closer to this extreme of lean angle, however. 17" wheels and shorter modern fork swaps will hurt this lean angle issue.

Pretty interesting Chuck. How do you measure contact patch? Anything else we can read?

What if you are using the 3.5 x 17 wheel? What tire gives the best contact patch? Is wider just for looks then?

I wish we could use a dual compound tire like the Michelin Pilot Road 2CT.

[posplayr]

Yes i know lots of folks have done this but now you can see why they do. super easy. Just use the 87 GSXR1100 (4 inch) wheel and a GS500 sprocket carrier. For me im still going to use 630 chain and just a 150 tyre.

[ATTACH=CONFIG]53280[/ATTACH]

Very nice analysis

[thebrandonbeezy]

Pretty interesting Chuck. How do you measure contact patch? Anything else we can read?

What if you are using the 3.5 x 17 wheel? What tire gives the best contact patch? Is wider just for looks then?

I wish we could use a dual compound tire like the Michelin Pilot Road 2CT.

140 or 150 cant remember

[sharpy]

Very nice analysis

Thanks, tho i think i wore out a set of verniers. lol