18 inch front rim sawp, what length spokes?

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dd9ucx
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Suzuki 2-Strokes: gt200 t500 dr650 gsxr1100

18 inch front rim sawp, what length spokes?

Post by dd9ucx »

Hello, I have some 18 inch Boriani rims that I want to put on a gt5750 front wheel which currently has a 19 inch rim.
Does anyone know what length spokes I need to order?
Thanks
Jason
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tz375
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Re: 18 inch front rim sawp, what length spokes?

Post by tz375 »

I suspect that Buchanan's will know the answer to that question. I ordered spokes for a GT750 rear wheel with a DID drop center rim and they knew exactly what I needed.
daxman
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Re: 18 inch front rim sawp, what length spokes?

Post by daxman »

You'll need to get your ruler out but this might help.. As mentioned getting an accurate measurement of 'effective rim diameter' is the key.
I've done a few push-bike wheels which I'll admit I found tricky to true - but never a m'bike... Yet!

http://earlymotor.com/leon/misc/html/spoke.htm" onclick="window.open(this.href);return false;" onclick="window.open(this.href);return false;
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tz375
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Re: 18 inch front rim sawp, what length spokes?

Post by tz375 »

I didn't notice you were in France. When I rebuilt one GT750 front wheel with an 18" DID alloy rim, I was able to use a set of spokes from a TZ250/350 C/D/E/F model. The hubs are almost identical in width and diameter.
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jabcb
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Re: 18 inch front rim sawp, what length spokes?

Post by jabcb »

The GT250 uses the same hub as the GT550/GT750, and it has an 18” rim.
If the DID rim cross-section profile is about the same the Suzuki rim, I would expect the GT250 spokes to work fine. But if its a wide-width drop center rim, the spokes would need to be a little shorter.

The GT250 spokes are also used on several GS models & the TU250X. The spokes are available from Suzuki.
The GT250 rim is 18x1.60. The TU250X rim is 18x1.85 & is available from Suzuki.

For my GT550 build, I used an 18x2.15 Excel rim + Buchanan’s polished stainless steel spokes. The results are definitely nice.
Buchanan’s has been making spokes and building wheels for many decades. Given the hub & rim, the know what spoke specs are needed.

They should be a similar shop in Europe that will know the spoke specs given your choice of hub & rim. One has been mentioned on this forum — perhaps one of the European members will have that info.
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dd9ucx
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Suzuki 2-Strokes: gt200 t500 dr650 gsxr1100

Re: 18 inch front rim sawp, what length spokes?

Post by dd9ucx »

Thanks for the replies, forgot to say its a twin disc brake hub, not the drum brake.
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tz375
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Re: 18 inch front rim sawp, what length spokes?

Post by tz375 »

That's what I laced into a DID rim with TZ spokes and sounds like that's what JABCB is talking about too.

https://www.partzilla.com/product/suzuk ... 95137f2e8d" onclick="window.open(this.href);return false;

I may still have a spare set of TZ spokes that I could measure if you need me to.
daxman
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Re: 18 inch front rim sawp, what length spokes?

Post by daxman »

https://www.central-wheel.co.uk/" onclick="window.open(this.href);return false;
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busa1300
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Re: 18 inch front rim sawp, what length spokes?

Post by busa1300 »

I just measured mine
Look like about 7 inches....possibly 7.25
Not sure how far they are going into the nipple....it's been a while since I did these

Image

Image
MY TWO STROKE ADDICTION
TZR250SP 3XV2...
RS 250 Cup bike
RGV VJ21 L
RGV VJ22 FL
RGV VJ23 T
RZ 350
GT 750 J....sold.....
SX-R 800
KD 80
JR 50
RZV 500 R
https://www.youtube.com/@wedgehorsepower9869/videos
sportston
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Re: 18 inch front rim sawp, what length spokes?

Post by sportston »

Interesting floating discs you have there. What are they from? Are they the same diameter as normal?
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busa1300
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Re: 18 inch front rim sawp, what length spokes?

Post by busa1300 »

The rotors are from 84/86 GS1150, or GSX1100EFE depending on what country bike was sold
Same size as GT and GS rotors throughout the 70's
Direct bolt up.

A better look at them here...
viewtopic.php?f=15&t=12671&start=15#p169487" onclick="window.open(this.href);return false;
MY TWO STROKE ADDICTION
TZR250SP 3XV2...
RS 250 Cup bike
RGV VJ21 L
RGV VJ22 FL
RGV VJ23 T
RZ 350
GT 750 J....sold.....
SX-R 800
KD 80
JR 50
RZV 500 R
https://www.youtube.com/@wedgehorsepower9869/videos
sportston
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Posts: 1119
Joined: Wed Jul 10, 2013 12:04 pm
Country: England, UK
Suzuki 2-Strokes: FZ50, GP100, RG125 Gamma, GT380, Bandit 1200S

Re: 18 inch front rim sawp, what length spokes?

Post by sportston »

interesting thanks. Might use that info to good effect if i find my gt brakes aren't up to snuff
dollydog
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Re: 18 inch front rim sawp, what length spokes?

Post by dollydog »

just measured a new set of gt250 spokes [18" rim] and both sets are 80mm long from the corner of the bend to the end of the thread. 18 of them have 90 degree bends on them, the other 18 have slightly more than 90 degrees. hope this helps? :D
cheers, dd.
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