SOHC.co.uk Forums > CB750

Truing wheels, tyre selection and balancing

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K2-K6:
I use these sites to compare specs,  may be of use.

https://tiresize.com/calculator/

It may be the chainguard that first limits the rear, coming close to the tire shoulder. 

Or with extra link in chain you can possibly run it slightly more rearward to bring the tire out a bit from any narrowing at the front of the swingarm to increase the tire width.

Trigger:
The closest part to the tyre is the torsion bar. With a 120 tyre, it only leaves you about 10mm  ;)

Underdog1:

--- Quote from: Trigger on May 28, 2018, 08:01:10 PM ---The closest part to the tyre is the torsion bar. With a 120 tyre, it only leaves you about 10mm  ;)

--- End quote ---

Nice, thinking about it I think the bike came with some ancient 4.50 on the rear anyway.

I really like the TT100 but the closest sizes I can find to what I’m after is a 4.10-19 59H up front and a 4.25/85-18 64H rear. For whatever reason the 4.25 Tyre is the only one in the TT100 that has a profile specified (85). Is this suitable?

Trigger:
4.10 on the front is tight but, it depends on the mudguard. You will also get a lot of tyre flex at that size on the front. Most people drop the wheel rim size to 18" on the front because there is a greater range of that tyre size  ;)

Underdog1:

--- Quote from: Trigger on May 28, 2018, 09:24:16 PM ---4.10 on the front is tight but, it depends on the mudguard. You will also get a lot of tyre flex at that size on the front. Most people drop the wheel rim size to 18" on the front because there is a greater range of that tyre size  ;)

--- End quote ---

Hmm no mudguard just using the inner brace section from one. The next size down is 3.60 which I feel won’t give me the thick rubber look I want.

May just go for the 4.10 up front as in not exactly going to be getting my knee down on the old girl anyway

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