Tire Sizes 90/90-18" 100-90 18"

Spargett · Post by **Spargett** » Tue Dec 16, 2008 8:05 am

From what I understand Tire Sizes 90/90-18" 100-90-18" equates to 3.00-18" and 3.25-18". Just a hair larger than the stock tires on the CB77's. Of which a few people have tried on here with success. Which isn't surprising considering its only 1/4" difference. What I'm wondering is if there's any real difference between the "front" and "rear" tire when ordering. I'm having a hard time finding a decent set with 100-90-18". But there are plenty of sets with two "front" wheels sized 90/90-18" 100-90-18".

For example. They make the C906 - front tire in both the same size as the front and back would fit. (I know those are tubeless, just a sizing/tread example): http://www.jcwhitney.com/CHENG-SHIN-STR ... _10111.jcw

On a somewhat related note. Does anyone know what tires these? They look similar to the Cheng Shin Barracudas, of which I know they made in 90/90-18" 100-90 18". I'm just having a bit of a hard time tracking them down online.

Any input is appreciated.

rbaselt · Post by **rbaselt** » Mon Jan 12, 2009 7:43 pm

Why not get the period-style tires in the correct tube-type sizes? They were still available from JC Whitney last time I checked: 621665 is a 3.00 x 18 K70 lookalike for the rear and 621675 is a 2.75 x 18 ribbed tire for the front. --Randall

Spargett · Post by **Spargett** » Mon Jan 12, 2009 9:46 pm

From what I understand the direction treaded pattern developed and used on street bikes since, has superior traction performance. I'm really just looking for the best tires I can get.

The K70 tread pattern just doesn't make much sense to me. I'm all ears if someone can explain (outside of them the the recommend size) how they're a superior tire.

Looks like JC Whitney's smallest size is a 3.25.

rbaselt wrote:Why not get the period-style tires in the correct tube-type sizes? They were still available from JC Whitney last time I checked: 621665 is a 3.00 x 18 K70 lookalike for the rear and 621675 is a 2.75 x 18 ribbed tire for the front. --Randall

Spargett · Post by **Spargett** » Wed Jan 14, 2009 4:41 pm

I came across some Avon Roadrunners in 90/90 18" & 100/90 18" from Tires Unlimited.

If one were to put the Avon AM26 RoadRiders on the stock rims, would it be better to get the 90/90 front and the spec 90/90 on the rear, or try and increase the size proportionately to 100/90.

Front: 90/90 Rear: 90/90? or

Front: 90/90 Rear: 100/90?

It appears to be what's on the Superhawk that I attached a little higher up.