Topic: Thinking of going to a 1.85 x 17 front wheel

[azuredesign]

 sohc 750: Are there any problems or disadvantages with doing this? Can the speedo gear be changed to work with a 17" wheel? How wide a front tire could I run with this rim?
Thanks for any ideas.

[crazypj]

If your going 17" why go so narrow on rim?
 1.85rim has max tyre size around 3.50" although 3.25 would be better.
A modern120 tyre needs a 3.00 rim but it's more usual to see them on 3.50"rim

PJ

[mlinder]

You are still limited by clearance issues with the mounts for brakes and fender.

A 1.85 rim is made for 90 (maximum) tires. Smaller, really.

This sounds like a small wheel for a sohc4, really. What bike is this for?

[azuredesign]

Ah, I came across a 1.85x17 alloy rim for cheap and i though maybe I could use it, but I think I'll hold out for a 2.85.
Is the max front tire size with clearance a 120?

Thanks!

[kos]

Watch out for some serious head shake if your over all diameter get's to small. Better use a steering dampener, but if it is a "look at Me" bike..go for it! Steering head angle might be getting a bit steep with a very small diameter wheel.

KOS

[mlinder]

Ah, I came across a 1.85x17 alloy rim for cheap and i though maybe I could use it, but I think I'll hold out for a 2.85.
Is the max front tire size with clearance a 120?

Thanks!

I have never tried a 120 front on a 750.
Not sure if it's possible with stock fender on and such. 120 is wiiiide.

[azuredesign]

I have never tried a 120 front on a 750.
Not sure if it's possible with stock fender on and such. 120 is wiiiide.

So what's the max then, 100 or 110? Couldn't I put a 100/90 on that 1.85 x 17 rim?

[Alan F.]

Here ya go Ben, this guy's in Boston even.... he's got a 120/80-17 up front with stock brakes and fender.

http://forums.sohc4.net/index.php?topic=50756

And I think MCRider is still going with a 17" front too, maybe he'll chime in with some of his findings.

Cheers.
-Alan

[azuredesign]

Thanks Alan,
I'll look forward to speaking with you tomorrow eve over some Cervezas and guacamole. After seeing how small the 17 looks on there, I think I might go stock or 18" alloy, but I want to see what my tire and rim options are.

[crazypj]

I have a WM3x18" genuine Boranni rim off back of CB750, not sure if I want to sell it though as will cost too much to replace if I ever get round to swapping front rim on 550 or building it into 'new' hub (it has 19" Boranni at present)

PJ