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Discussion Starter #1
hi there

i have a 1974 750 GT just got it running again an it desperately needs a new set of tyres the rims are the original BORRANI and currently i have a continental 3.5 by 19 on the front and an AVON 4.10 by 18 on the back. i'm not so sure the front tyre is the appropriate one ( it doesn't handle too well ) any suggestions for a new set would be greatly appreciated.

cheers
 

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Avon AM26 Roadrider 100/90V19 + 110/90V18 would be very suitable assuming you have 2.15 rims front and back
 

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I believe that the front rim is a 1.85? in which case anything bigger than a 90/90 x 19 will be pinched up too high by the rim. I use a 90/90 x 19 on the front and a 110/90 x 18 on the rear. Avon Roadriders of course!
 

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I believe that the front rim is a 1.85? in which case anything bigger than a 90/90 x 19 will be pinched up too high by the rim. I use a 90/90 x 19 on the front and a 110/90 x 18 on the rear. Avon Roadriders of course!
I'm running the same sizes on my '74 GT. If you go too wide on the front the tire will rub on the fender stays. I'm not sure if "too wide" is 100 or 110... but if you join the bevelheads mailing list I'm sure someone will chime in with the answer. Or just wait a while and when Rolland sees this he'll set us straight. :p
 

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+ 1 DesmoDog; I tried a 100/90 on the front of my Sport and it rubbed the stays.
 

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Discussion Starter #6
hi

the current front tyre is extremely close to rubbing the fender stays
how many of these lovely old bikes are out there? the bike is actually my dad's he bought it new. hadn't run for quite some time until the other day, lovely to hear that exhaust note come out of the conti pipes again.

cheers
 

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can someone please confirm what size rim is on the sport FRONT? I thought they were 2.15 but it sounds like they are smaller than that?
 

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cool thanks for verifing that. I have both the 100/90V19 + 110/90V18 kits as well as 90/90V19 + 110/90V18 kit for AM26 on my site. I will note the rim restraints to the posted info, thanks
 

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Avon am 26 roadriders

I believe that the front rim is a 1.85? in which case anything bigger than a 90/90 x 19 will be pinched up too high by the rim. I use a 90/90 x 19 on the front and a 110/90 x 18 on the rear. Avon Roadriders of course!
Duccout;
My 1978 900GTS has 12yr old Michelin's 100 90 19 front, and 130 90 18 on rear.
I'm wanting to replace the old hard tyres .
Would your suggestion of 90 90 19 front and 110 90 18 rear work with the GTS
or the 110 90 19, 110 90 18 rear work better with a GTS? I know every thing about my bike, but I don't know squat about tyre sizes and combination's. I priced the front & rear Avon am 26 road riders 235.96 $ shipping included,
price is very reasonable.Your thoughs? Capt Paul
 

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Your GTS has 2.15 x 18" rims front and rear I believe? So the correct sizes are 100/90 x 18 front and 120/90 x 18" rear.
 

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cool thanks for verifing that. I have both the 100/90V19 + 110/90V18 kits as well as 90/90V19 + 110/90V18 kit for AM26 on my site. I will note the rim restraints to the posted info, thanks
so you are selling stuff your not sure will fit--surely not-doesnt sound right---thought you were the man--perhaps not!!--but will say,always get the right stuff from you-at a price
yours in loudness--BLABBER
 

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Hi Steven [blabber] I have several size combinations for AVON AM26 on my site applicable to many different bikes, not just Ducatis. No, unfortunately I don;t know everything. And sometimes I make mistakes or don;t recall what I used to or at least should know. I ain't perfect - but I try.

To the GTS guy, you have 18" rims front and back most likely 2.15" - I concur with the tire recommendation posted above for you or even smaller on the back at 110 as the 120 really is for 2.50 rims and bigger is not better. Whoever put on that 130 ruined the handling of your bike assuming again that it is a 2.15 rim back there.....

We have installed lots of 100 F and 110 back tires on 900SS with 2.15 rims and they handle great like that. We put 120s on the back of the later SS with 2.50 back rim.
 

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Tyre sizes

Read my post again,100/90/19 on the front,130/90/18,on the rear, the front rim is a boranni
19", the rear is a steel wide rim 18" do I use a 100/90/19 on front? and a 110/90/18 on the rear. All I'm asking is for a little advice,what to buy, not a pissing contest. Thanks Capt Paul
 

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That's weird; the front rim is non standard. The easy answer is: have a look at the rim width. If it is a 1.85 then fit a 90/90; if it is 2.15, then fit 100/90. Better would be to change the rim to the correct one.
 
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