Triumphrat

tnsen · 04-18-2005

time to replace my tire (front) on my 71 bonnie...2 questions..1 is this something i can do with out special tools...i mean it is just like my kids bicycle right!! ...pop off the tire with a screwdriver replace tire and tube , inflate and im ready to go right!! ...i think..second ...my tire is 19x3.25..but all the tire sizes are 130 100 110..r these metric sizes?? ...how do i convert??....am i stuck in the 70s??.......tom

tnsen · 04-18-2005

time to replace my tire (front) on my 71 bonnie...2 questions..1 is this something i can do with out special tools...i mean it is just like my kids bicycle right!! ...pop off the tire with a screwdriver replace tire and tube , inflate and im ready to go right!! ...i think..second ...my tire is 19x3.25..but all the tire sizes are 130 100 110..r these metric sizes?? ...how do i convert??....am i stuck in the 70s??.......tom

04-18-2005

You'll still want to have your tires balanced. Also new tires have a mark where the tire should meet the tube stem. I looked into the same size crossover issue as you with poor sizing results. Most bike parts shops will mount and balance your tires free if you buy from them. I went with Dunlop K70 front and Dunlop K81 rear. I think i was about $160-$170 for both out the door. I have heard good things about avon venoms. But i ordered the Dunlops in the correct sizes as they are the reproduction of the original tires for your Bonnie (took 1 day). Hope this helps, but if you have a good bike parts shop in your town that installs tires thats the way i went.
PS ususally you will have to unmount the rims from the bike and take them in to get free install and balance. :-g

04-18-2005

You'll still want to have your tires balanced. Also new tires have a mark where the tire should meet the tube stem. I looked into the same size crossover issue as you with poor sizing results. Most bike parts shops will mount and balance your tires free if you buy from them. I went with Dunlop K70 front and Dunlop K81 rear. I think i was about $160-$170 for both out the door. I have heard good things about avon venoms. But i ordered the Dunlops in the correct sizes as they are the reproduction of the original tires for your Bonnie (took 1 day). Hope this helps, but if you have a good bike parts shop in your town that installs tires thats the way i went.
PS ususally you will have to unmount the rims from the bike and take them in to get free install and balance. :-g

jimballard · 04-18-2005

You can do it yourself, but be advised, it's like a bicycle tire on steroids! You'll be needing the right type of tire irons and a lot of muscle, then, you'll have to be extra careful not to "pinch" the tube when you mount the new tire. I remember a 6 hour comedy of errors in mounting a tire on my 1970...that was the last time I did it myself. Back when I was young and foolish, I would do my own car tires, but I learned. Most bike shops will sell and mount tires at a reasonable cost; some may even let you buy one from a catalog and you can pay them for the mounting. Whatever, it's not all that expensive to have it done professionally, and you won't end up with what I refer to as "Metzler arthritis" the next morning! The 3.25x19 is usually converted to a 90/90x19 although some tire styles will allow a 100/90x19 to fit as well. Check with the tire manufacturer. Some of the old classic sizes are still available; check the catalogs.

Hope this helps: Jim

jimballard · 04-18-2005

You can do it yourself, but be advised, it's like a bicycle tire on steroids! You'll be needing the right type of tire irons and a lot of muscle, then, you'll have to be extra careful not to "pinch" the tube when you mount the new tire. I remember a 6 hour comedy of errors in mounting a tire on my 1970...that was the last time I did it myself. Back when I was young and foolish, I would do my own car tires, but I learned. Most bike shops will sell and mount tires at a reasonable cost; some may even let you buy one from a catalog and you can pay them for the mounting. Whatever, it's not all that expensive to have it done professionally, and you won't end up with what I refer to as "Metzler arthritis" the next morning! The 3.25x19 is usually converted to a 90/90x19 although some tire styles will allow a 100/90x19 to fit as well. Check with the tire manufacturer. Some of the old classic sizes are still available; check the catalogs.

Hope this helps: Jim

okiecityflash · 04-18-2005

I'm a newby to this site,but not to the sport. I ride a t140e that came with dunlop tt 100's in 1979. I didn't care for them so much in this part of the country. Mostly flat and straight. In the 80's I went with the largest I could find. Dunlop 391 elite 100 /90/19 universal . To heavy,lasted a long time. Slowed steering somewhat. Dunlop 120/90/18 on the rear. Had to modify chain guard. Lasted a long time. Both looked good. Now I'm running Avon Roadrunners. 90/90/19 on front (stock wm2 rim) . Steering is faster(dosen't fall off ,very predictable) RR on the rear /110/90/18 (wm3 rim). Very satisfied. Had to brace my chain guard as it lost its strenghth when I cut it. If I was into looks I'd go with 100/90/19front&110/90/18 rear.For show points I'd go with originals. Just my experience. If I needed money bad like the old days I'd do it my self. Now I let the pros do it and tell them to take care of my cherry rims.

okiecityflash · 04-18-2005

I'm a newby to this site,but not to the sport. I ride a t140e that came with dunlop tt 100's in 1979. I didn't care for them so much in this part of the country. Mostly flat and straight. In the 80's I went with the largest I could find. Dunlop 391 elite 100 /90/19 universal . To heavy,lasted a long time. Slowed steering somewhat. Dunlop 120/90/18 on the rear. Had to modify chain guard. Lasted a long time. Both looked good. Now I'm running Avon Roadrunners. 90/90/19 on front (stock wm2 rim) . Steering is faster(dosen't fall off ,very predictable) RR on the rear /110/90/18 (wm3 rim). Very satisfied. Had to brace my chain guard as it lost its strenghth when I cut it. If I was into looks I'd go with 100/90/19front&110/90/18 rear.For show points I'd go with originals. Just my experience. If I needed money bad like the old days I'd do it my self. Now I let the pros do it and tell them to take care of my cherry rims.

okiecityflash · 04-18-2005

PS, Kinda long winded, but I spent a month researching the web for everything available. I didn't go withv rated tires like the 391 elites as the bike is not that fast and I heard that they rie harder. I got stock shocks and they ride hard enough in the chuckhole capital of the USA. I'm running 26 psi on the front & 30 psi on the rear for short runs. That gives me 10% pressure rise hot on the front and 20 % rise hot on the rear. It rides the best since I bought it. I don't know how long they will last, but they are nice and sticky. I had new rim strips installed trued and balanced. 200 bucks and change in OKC.

okiecityflash · 04-18-2005

PS, Kinda long winded, but I spent a month researching the web for everything available. I didn't go withv rated tires like the 391 elites as the bike is not that fast and I heard that they rie harder. I got stock shocks and they ride hard enough in the chuckhole capital of the USA. I'm running 26 psi on the front & 30 psi on the rear for short runs. That gives me 10% pressure rise hot on the front and 20 % rise hot on the rear. It rides the best since I bought it. I don't know how long they will last, but they are nice and sticky. I had new rim strips installed trued and balanced. 200 bucks and change in OKC.