CB350. Rear tire clearance question

sandman28 · Mar 28, 2014

First photo shows amount of clearance from rear rim to bottom of seat pan to rim. (roughly 5 3/4" from top of rim)
will be running 110/80 or 100/90 rear tire. Do i have enough clearance for travel of stock length rear shocks????
nothing sits below top of frame at the rear.
second photo shows how I wanted to mount the tail light. but it will sit another inch below.

any input is greatly appreciated. thanks.

sandman28 · Mar 28, 2014

PHOTOS

mydlyfkryzis · Mar 28, 2014

Are you putting wider rims on? Are you considering the tires may not fit inside the swingarm?

While tire sizes are standard, the actual width of the tires vary by model...So even if that size fits with a different model/brand tire, it may or may not fit with the one you chose.

See here for info on rim width versus tire width:

http://www.dotheton.com/forum/index.php?topic=59082.msg666313#msg666313

sandman28 · Mar 28, 2014

planning on sticking with stock rims. Going with Avon RoadRider tires. Ive heard a ton of people post that they run those tires , size 90/90 front, 110/80 rear on stock CB rims and there are no issues. Regardless I havent got tires yet.. and will do more research and buy whatever fits on stock rims. Right now im concerned with clearance to seat with running tires near stock size

mydlyfkryzis · Mar 28, 2014

No issues? LOL....I guess if you really don't ride well, you will never notice the difference...

You do know Fat tires on skinny rims really ruin the contact pact and sidewall flexibility.

Sure, you can roll the bike down the street....But the handling, braking, and turning capability are less then stock, and a lot less then those tires can do on the right width rims.

So if someone has no issues at all with it, then that someone is just ignorant.

Heavier, bigger tires also reduce acceleration, just from the rotational mass.

So I suspect you are only concerned with looks, even if it compromises handling.

Good luck then..

sandman28 · Mar 28, 2014

Maybe I'm wrong... but isnt 90/90 front and 100/90 rear, the stock tire size for a CB350 ? I dont care about looks when It comes to tires... Its not a race bike, I want it to handle well... so I'm sticking with stock tire size.
I'll keep looking I guess in regards to my clearance question, thanks for your input.

xb33bsa · Mar 28, 2014

sandman28 said:
First photo shows amount of clearance from rear rim to bottom of seat pan to rim. (roughly 5 3/4" from top of rim)
will be running 110/80 or 100/90 rear tire. Do i have enough clearance for travel of stock length rear shocks????
nothing sits below top of frame at the rear.
second photo shows how I wanted to mount the tail light. but it will sit another inch below.

any input is greatly appreciated. thanks.

no ,start over
fer chrisakes it is not rocket science
this is a very common bewilderingly frequent mistake people make when they have absolutely no clue what they are doing

sandman28 · Mar 28, 2014

Ok thanks, not much to "start over" except putting bigger spacer between seat and frame.

xb33bsa · Mar 28, 2014

sandman28 said:
Ok thanks, not much to "start over" except putting bigger spacer between seat and frame.

put tire on rim
take off one shock
set the other shock preload to soft
with a ratchet strap attached to upper frame and axle on the side with a shock,pull the swingarm up hard against the bump stop of the shock
leave at least an inch clearance to any seat pan,loop or frame cross pieces

sandman28 · Mar 28, 2014

Thanks xb33bsa .

mydlyfkryzis · Mar 28, 2014

sandman28 said:
Maybe I'm wrong... but isnt 90/90 front and 100/90 rear, the stock tire size for a CB350 ? I dont care about looks when It comes to tires... Its not a race bike, I want it to handle well... so I'm sticking with stock tire size.
I'll keep looking I guess in regards to my clearance question, thanks for your input.

No.
3.00-18 = 80/90-18
3.50-18 = 90/90 - 18.

I would still put wider rims on. the stock size with wider rims (STD in the grey area for the size) have less flexible sidewalls, making the bike more responsive. I was surprised how much better my CB360 handled with the same exact tires and one size wider rims.

Also, for good handling, make sure spokes are tight and even, and runout is minimum. It really does more than any single other thing.

These bikes aree not nose bleed fast, but set up well, they can handle quite nicely. They become light feeling and flickable, without the wobble and uncertainty they seek to normally have. The 350 should respond better than the 360. I used to have a 69 350, and it handled better normally than my 360. Had I had the wherewithall to improve the rim width and runout, I expect the 350 would of been a really nice handling bike for it's day.

sandman28 · Mar 29, 2014

Looking at rims from MikesXS. Reading alot of people saying they lace up to the CB 350 hubs with no major issues. and they are cheap.
does 1.85 front and 2.15 rear seem correct for running 90/90 and 100/90 ?

mydlyfkryzis · Mar 29, 2014

They are in the acceptable range, but 2.15 in the front would be better, and 2.50 in the rear.

An excerpt from http://www.avonmoto.com/download/Tires_101.pdf which is in http://www.avonmoto.com/

For anyone wondering why Tire and rim widths are important. The original PDF is good reading too, includes tire sizing, and other aspects of tire selection:

sandman28 · Mar 31, 2014

thanks for the link, good read. On mikesxs site im only seeing "H type" rims. Ive read that this style is for street use, but i see alot more reference to WM . Curious if there is a difference in tire options, performance etc with H type ?
are H type a good choice for the CB ?
thanks

mydlyfkryzis · Mar 31, 2014

The original Akront style rim is shouldered for extra strength. Motocrossers like that shape as it is less likely to deform after a jump or large bump. I don't know if mike's XS H rims are stronger, but I have them on my bike. The width's and tires are the same. The difference is in the cross section.

sandman28 · Mar 31, 2014

Thanks, wanted to make sure the widths would be the same mainly. Now i need to decide on black rims w/ black hubs and stainless spokes. or "silver" with polished hubs....

mydlyfkryzis · Mar 31, 2014

I did silver with SS spokes and silver painted hubs. I think they came out nicely, and period correct....I also think the black hubs and stainless spokes would be sharp looking. Depends on the effect you are looking for.

sandman28 · Mar 31, 2014

yah im torn... I like the Period "vintage" look of all silver... either way going with 2.15 in the front and 2.5 rear with 90/90 & 100/90 Avon's. Thanks for your help.

CB350. Rear tire clearance question

Been Around the Block

Been Around the Block

Attachments

当有疑问时踢你的敌人在生殖器上，你可以道歉后

Been Around the Block

当有疑问时踢你的敌人在生殖器上，你可以道歉后

Been Around the Block

Over 1,000 Posts

Been Around the Block

Over 1,000 Posts

Been Around the Block

当有疑问时踢你的敌人在生殖器上，你可以道歉后

Been Around the Block

当有疑问时踢你的敌人在生殖器上，你可以道歉后

Attachments

Been Around the Block

当有疑问时踢你的敌人在生殖器上，你可以道歉后

Been Around the Block

当有疑问时踢你的敌人在生殖器上，你可以道歉后

Been Around the Block

DTT Light or Dark

Spread the Love