Tire /wheel option
Tire /wheel option
Some food for thought considering the tire selection available. Has any one considered this before? There is a place in California called Kosman Specialties. http://www.kosman.net. Click on the Wheel weld up form. They can increase diameter and width. You would end up with a 17" X 5.5" that would take current rubber. A 180 on a 5.5" rim is approx 6.75" in width (taken at widest point.) I measured my 160 and it measures 6.5". I think it will be close but it should fit. Same can be done with front but there are some decent tires available for it. It would look stock (or close) but a bolt on option without costly wheel conversions. What do you think?
- higgy
- paso grand pooh-bah
- Posts: 3377
- Joined: Tue Jul 29, 2008 9:50 pm
- model: 907 I.E.
- year: 1992
- Location: Hilltown,Pennsylvania
- Contact:
Re: Tire /wheel option
Ducati,making mechanics out of riders since 1946
There's no problem so bad that a little fixing can't make it worse! : )
Electrocuted Birds Are Bursting Into Flames and Starting Wildfires
88 750
90 906
92 907ie
There's no problem so bad that a little fixing can't make it worse! : )
Electrocuted Birds Are Bursting Into Flames and Starting Wildfires

88 750
90 906
92 907ie
Re: Tire /wheel option
Sorry ,my bad. didn't realize this was nothing new but has anyone on here actually tried this and how were your results?
- paso750
- paso grand pooh-bah
- Posts: 5568
- Joined: Sun Jul 18, 2004 12:00 am
- model: 750 Paso
- year: 1987
- Location: southern Germany
Re: Tire /wheel option
I guess noone did as it`s not cheap and with a few existing tire alternatives there`s less pressure doing 17" conversions.
G.
G.
- micklm
- Posts: 103
- Joined: Fri Jun 05, 2009 8:53 pm
- model: 906 Paso
- year: 1989
- Location: Taranaki, New Zealand
Re: Tire /wheel option
Hi,
I recall considering this, but was worried about a minimum width increase with the new flanges?
i.e. as I read it, the increase in diameter came with a complusory minimum width increase?
No issue for the rear wheel, as you state, or at least manageable.
But for the front wheel is it possible to go from a rim width for a 130/60 tyre to a wider tyre? Also you can't go down to a 120/70 width (my ideal 17in tyre option)?
My thinking was if there is always a width increase for the weld up option, then 120/70 is not possible and maybe the front tyre size wouldn't be ideal (wider than 130/60)?
So then you would have to have a new 17in wheel at the front and a weldup of the original OSCAM wheel at the rear.
My Paso is no show machine, but different style wheels front and back is too much for me
Or use a wide front tyre? But I know the 120/70 and 120/60 tyres characteristics from my Supersport and wanted to go with one of these tyres.
So I went with a 17in wheel conversion on my 906, using parts I had lying around (spare Supersport wheels).
In the end, it wasn't that much cheaper than the weldup costs, as I was on a short timeline and had to pay someone else to do some of the machining to save time........
Probably I have got this wrong about the minimum width for the weldup(?), so might be worth checking with the manufacturer on this specific issue.
Cheers,
Mick
I recall considering this, but was worried about a minimum width increase with the new flanges?
i.e. as I read it, the increase in diameter came with a complusory minimum width increase?
No issue for the rear wheel, as you state, or at least manageable.
But for the front wheel is it possible to go from a rim width for a 130/60 tyre to a wider tyre? Also you can't go down to a 120/70 width (my ideal 17in tyre option)?
My thinking was if there is always a width increase for the weld up option, then 120/70 is not possible and maybe the front tyre size wouldn't be ideal (wider than 130/60)?
So then you would have to have a new 17in wheel at the front and a weldup of the original OSCAM wheel at the rear.
My Paso is no show machine, but different style wheels front and back is too much for me

Or use a wide front tyre? But I know the 120/70 and 120/60 tyres characteristics from my Supersport and wanted to go with one of these tyres.
So I went with a 17in wheel conversion on my 906, using parts I had lying around (spare Supersport wheels).
In the end, it wasn't that much cheaper than the weldup costs, as I was on a short timeline and had to pay someone else to do some of the machining to save time........
Probably I have got this wrong about the minimum width for the weldup(?), so might be worth checking with the manufacturer on this specific issue.
Cheers,
Mick
906 Paso 1989 w/ 17in wheels 

- ducinthebay
- paso grand pooh-bah
- Posts: 1323
- Joined: Sat Sep 03, 2005 12:00 am
- model: 750 Sport
- year: 1990
- Location: SF Bay Area
Re: Tire /wheel option
I think one of the deciding points for the for the weld ups would be if you have a really nice set of brakes on your bike already. The weldups will give you your 17" wheels at a minimum amount of work.
If you want to upgrade your brakes and do 17" wheels,then you might be better off doing the SS/Monster wheels, and all the stuff and work that goes with it. Putting on newer 310 or 320 rotors certainly is tempting, especially with 4 pot calipers.
Weldups are certainly the fastest, easiest way. All it takes is money.
Same as ever. Fast, Cheap, Good . Pick two.
Cheers,
If you want to upgrade your brakes and do 17" wheels,then you might be better off doing the SS/Monster wheels, and all the stuff and work that goes with it. Putting on newer 310 or 320 rotors certainly is tempting, especially with 4 pot calipers.
Weldups are certainly the fastest, easiest way. All it takes is money.
Same as ever. Fast, Cheap, Good . Pick two.
Cheers,
Duc in the Bay
1990 750 Sport x2-Rosso Blanko (900ss copy) & Nuovo Nudo (Scrambler project)
1991 907 -mostly stock
2002 ST4s - Lots of mods.
1990 750 Sport x2-Rosso Blanko (900ss copy) & Nuovo Nudo (Scrambler project)
1991 907 -mostly stock
2002 ST4s - Lots of mods.
-
- Posts: 440
- Joined: Thu Aug 26, 2010 10:52 pm
- model: 906 Paso
- year: 1991
- Location: lewes sussex
- Contact:
Re: Tire /wheel option
sticking to sixteen inches gets my vote now there are tyres out there that will do the job and fit the wheels.




1990 906 paso red and white
1991 906 paso black and gold
1997 ST2 red
2004 ccm r30 with 710 conversion
175 moto morini road race replica
a box of bits r100 bmw scrambler project
1962 rover 95 p4
1997 iveco daily
a non running xt600...stator needed
1991 906 paso black and gold
1997 ST2 red
2004 ccm r30 with 710 conversion
175 moto morini road race replica
a box of bits r100 bmw scrambler project
1962 rover 95 p4
1997 iveco daily
a non running xt600...stator needed
- persempre907
- paso grand pooh-bah
- Posts: 3312
- Joined: Tue Dec 06, 2005 12:00 am
- model: 907 I.E.
- year: 1992
- Location: Roma, Italia
Re: Tire /wheel option
For sure, a great braking improvement well worth for a daily use of the bike.ducinthebay wrote: Putting on newer 310 or 320 rotors certainly is tempting, especially with 4 pot calipers.
But, make any mod reversible






Ciao
Francesco
Ducati 907IE 1992 Rosso
Ducati 907IE 1993 Nero
Moto Guzzi Galletto 1960 Sabbia
BMW R Nine t 2019
Ducati 907IE 1992 Rosso
Ducati 907IE 1993 Nero
Moto Guzzi Galletto 1960 Sabbia
BMW R Nine t 2019