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Thread: I want a fatter front tire... Reply to Thread
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  Topic Review (Newest First)
09-29-2011 11:33 PM
Originally Posted by slimvulcanrider View Post
I might have moved it.. I am looking for it right now... you its still labeled OCR Tube sizes, and OCR Stem Sizes... they are not in the DIY manual
Found this OCR website slim:

Check Tech tips as I can`t link directly to it.
Coversion Charts for Fork Tube Sizes & Steering Stem Bearings
Standard Fork Tube Sizes
Stock Steering Stem Sizes
09-29-2011 04:15 PM
Found this old post here...

Found this old post about 1500 forks on a custom...mentions Harley front ends too...


09-28-2011 11:28 AM
Originally Posted by Wolfie View Post
Some custom shops which own a FloJet machine, could make you a custom triple tree...would be big bucks though, and IMO not worth it...
yeah, big bucks is not something i have haha. thanks, though!
09-25-2011 05:22 PM

Some custom shops which own a FloJet machine, could make you a custom triple tree...would be big bucks though, and IMO not worth it...

09-25-2011 01:42 PM
Originally Posted by darienmd View Post
I'm guessing it's in the "DIY Manual" file?
I might have moved it.. I am looking for it right now... you its still labeled OCR Tube sizes, and OCR Stem Sizes... they are not in the DIY manual
09-24-2011 04:59 PM

Not 100% sure on the triple tree size, but I know for awhile the Harley Sportsters and Superglides used the same forks as the Vulcan has (Showa), but I believe some Harley triple trees were wider. This way would almost be a bolt-on (prolly using harley brakes tho due to mounts), then just adding axle spacers (might need to have em custom machined), and also using a Harley compat rim (I like spokes, dangit)...If ya got lucky (not in my personal exp) but may just need to swap the triple tree and add spacers...THAT would be a dream ! I'd do it meself...
Just a thought, bring yer triple tree to a Harley shop, and ask em if there's a wider available...avoid tellin em what its for though, lol...say its off a Sportster...*wink*...
I had Japanese forks on my original '72 Super...a 53 front end fit (paid $100, and then changed seals)....I wonder if most necks are compatible....just a matter of replacement then. And think...one could even go to 1" bars !!!!

09-24-2011 04:30 PM
J.D. BTW, I know a guy that put an 800 front end on a 1500A; again, no advantage to trying an 800 front end on a 750, as the tire size on a VN800A is 90/21, and is tube type. Same guy turbocharged an early 1500 Classic...

09-24-2011 04:23 PM
Originally Posted by Knifemaker View Post
I could swear someone put a front end off a larger bike on the 750 without changing the neck, but not 100% sure what front end they used.

Perhaps someone can jog my memory on this and help you out also?

JD might know....Try sending him a PM:
Yep; a 1500A front end has been put on a 750, altho it ain't hit the street. The triple tree bearings and neck/steering head length are the same between the two. No advantage, tho, as far as larger tire size; the 750 and 1500A use the same size tire and wheel, front and rear.

(Got the message, Darien; had to split the reply into three sections.)

In my reply to Darien's PM, I said it'd make more sense to use the same front end, and hunt for a wider wheel that'd fit between the fork tubes. A wider wheel is prolly gonna be smaller diameter, tho; I haven't seen a stock 19" wheel that could carry a tire wider than a 110 safely. (Doesn't mean there ain't one out there; I just haven't seen one, and haven't researched it.) Problem might be brake disc and caliper diameter and spacing, and axle diameter. Axle diameter isn't that big a problem; differences can be made up with different bearings, matching bearing outer diameter to the hub, and inner diameter to the axle. Brakes might be a whole different story...

09-24-2011 02:26 PM
DavesVulster Ya man, I do hate riding on crappy roads with this bike. So many to choose from in Taxachussetts and some o' dem pot holes hurt!
09-24-2011 01:58 PM
Wide tires...

There IS an advantage to wide tires depending on where/how you mostly ride. For example : I live in farm and mountain country...many of the roads are in poor shape and even gravel. Almost all around here go for wider rims and tires. Adds to the "cushioning" effect that at times the forks wont produce, especially if slightly underinflated (10%).
After my accident with my SuperGlide (Showa forks bent like they were copper), I put a '53 wideglide front end on it. Triple tree bolted right up. And I added a new front tire (part of the old left with the Delta 88) and got one width narrower than rear. Had a 16" rim on rear, and a 19" Hallicrafters spool on front. What a dream that was to ride !...never shouldda sold it.

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