Topic: cb750k front tire size...

[brycegp]

Can a 500 width tire fit on a '71 cb750k...and have adequate clearance on the sides...?

My bike is broken down...and i don't have a 500 width tire to test it with anyway...  I don't wanna buy it and it not fit...

Thoughts, fellas??

[brycegp]

no one?

[Duke McDukiedook]

What are the dimensions of the tire?

[Operator]

The FAQ has a sizing chart

[brycegp]

Tire size:  500 = 5" widest point,  OD = 26.25"

I am NOT looking to use the stock tire size or the 'recommended' tire size.  I am moding the look of the bike and want to use a 500 on the front.  I am just trying to see of it fits before I buy it.  Thought someone might just know...

Like I mentioned...the bike is completely disassembled so I can't measure between the widest part of the fork lowers, right now.

Thanks for looking...

[crazypj]

What rim are you fitting?
on a stock rim-you must be crazy, needs WM4 or bigger (minimum 2.50" inside beads, about 3.25" on outside)

[brycegp]

custom...stock hubs laced into buchanan hoops...16 X 3.25....front and back matching rims and tires.

Well....that's the idea anyway...

[crazypj]

Going to be expensive then, Buchanan's aint cheap 

[brycegp]

ha...yeah...i know...i've done the research.  if you have a cheaper solution, I'm all ears.  But the front hub has to be custom punched...there are no 16" front hoops.  Unless there is an 18" hoop out there that was made for a front hub...I'd go that route too.

But hoops, spokes, lacing, truing, and coker tires....looks like I'll have almost a G into the wheels alone.  Effing...OUCH!

the questions still stands...will a 500 fit?

[Gordon]

I never tried a 5.00, but I can tell you that on my K1 with an Avon Roadrider 3.25-19 there is exactly 3/8" clearance at the tightest spot on both sides.

[brycegp]

3.25 + 2(.375) = 4.00" MAX clearance... 

[crazypj]

ha...yeah...i know...i've done the research.  if you have a cheaper solution, I'm all ears.  But the front hub has to be custom punched...there are no 16" front hoops.  Unless there is an 18" hoop out there that was made for a front hub...I'd go that route too.

But hoops, spokes, lacing, truing, and coker tires....looks like I'll have almost a G into the wheels alone.  Effing...OUCH!

the questions still stands...will a 500 fit?

 Don't think I understood your first post.
Rims don't care, you lace it to whatever hub you want.
CB750 has 40 hole hub (same as CB500/550)
You just need a 40 hole rim, whatever diameter you choose (within certain limits, tyres may not be available in some sizes)
 I have a couple of Harley rims which fit 5.00 x 16 tyre, don't know why you think it has to be custom?
 Spoke kits are available on e-bay to fit HD rims to Honda hubs, even if you paid Buchanan prices for spokes you should have less than $500.00 into wheels (spokes are about $100 a set)
 Just did a quick search of 16" HD rims, cheapest, $24.50   Pair, $154
http://cgi.ebay.com/ebaymotors/Triumph-16-Rim-BSA-Chopper-40-Hole-Harley-_W0QQcmdZViewItemQQhashZitem4a9d5619d8QQitemZ320467245528QQptZMotorcyclesQ5fPartsQ5fAccessories

[Burnboy]

The 750 cant handle a very big tire on the front. I swapped a gl1000 front end onto mine and fit a 130 front. I laced a 16'' by I think 3 inch front tire probably the biggest that will fit, theirs very little clearance to the fork tube lowers.

[brycegp]

The 750 cant handle a very big tire on the front. I swapped a gl1000 front end onto mine and fit a 130 front. I laced a 16'' by I think 3 inch front tire probably the biggest that will fit, theirs very little clearance to the fork tube lowers.

I have a 3.5" on my cb500 and its got about 1/4" clearance on each side.

[brycegp]

ha...yeah...i know...i've done the research.  if you have a cheaper solution, I'm all ears.  But the front hub has to be custom punched...there are no 16" front hoops.  Unless there is an 18" hoop out there that was made for a front hub...I'd go that route too.

But hoops, spokes, lacing, truing, and coker tires....looks like I'll have almost a G into the wheels alone.  Effing...OUCH!

the questions still stands...will a 500 fit?

 Don't think I understood your first post.
Rims don't care, you lace it to whatever hub you want.
CB750 has 40 hole hub (same as CB500/550)
You just need a 40 hole rim, whatever diameter you choose (within certain limits, tyres may not be available in some sizes)
 I have a couple of Harley rims which fit 5.00 x 16 tyre, don't know why you think it has to be custom?
 Spoke kits are available on e-bay to fit HD rims to Honda hubs, even if you paid Buchanan prices for spokes you should have less than $500.00 into wheels (spokes are about $100 a set)
 Just did a quick search of 16" HD rims, cheapest, $24.50   Pair, $154
http://cgi.ebay.com/ebaymotors/Triumph-16-Rim-BSA-Chopper-40-Hole-Harley-_W0QQcmdZViewItemQQhashZitem4a9d5619d8QQitemZ320467245528QQptZMotorcyclesQ5fPartsQ5fAccessories

I'm totally down to use the harley rims.  But my question is this...when I have them laced up... Don't the holes in each rim (front and rear) have to be punched at the correct angle or the spokes will bend??

Is that correct?  how do i get the correct rims for front and back hubs to be laced up without bending the spokes?

Buchanan reps told me this issue...maybe just to sell me their rims versus getting them on ebay.  but it makes sense that the angle in which the holes are punched in the rim must match the hub that your lacing it to.

thoughts??