| Author | Message | ||
     Pkforbes87 |
This morning I swapped out my cast wheels with Diablo Stradas (rear was DONE) for PM wheels with nearly new M3 Sportec's. The Strada rear was a 170 - what the manual recommends for the cast wheels. The M3 rear is a 180 - what the manual recommends for PM wheels. It may be only due to a difference in tire profile, but I think that I could get more lean angle out of the Stradas because the edge of the rubber wrapped farther around and at a steeper angle than the M3's do. The M3's are definitely stickier, but I feel the edge of the tire a lot sooner with them than with the Stradas. An after ride inspection verified what I was feeling on the road - I used every square inch of rubber on the right side of the rear tire just by taking an interstate on-ramp "aggressively". I'm a little surprised to be honest. Maybe a 190 rear on the PM's would be "pinched" a little more and offer a steeper angle at the edge of the rubber? I ran a 180 Sync on the cast wheels for a while and didn't have any problems with lean angle, but I've become a much better rider since that set of tires, so what I remember about those tires may be irrelevant. In any event, I've got quite a few miles to get out of these M3's before I need to look for new tires. Anyone else have experience comparing different tire sized between the cast and PM wheels? Thoughts? Am I just imagining things? | ||
| Dpg |
When I bought my M2 a couple of years ago the PO had 180 D220 Dunlops on it. I kept5 replacing the tires accordingly, but read somewhere about the transitioning from center to edge and back on a 170 versus a 180 on the stock cast wheels. I bought one of the new Roadsmart tires in a 170 to check it out. I think that chicken strip wll be narrower on a 170. A couple of dollars cheaper too. Safe ride, Gary in Oaktown | ||
| Preybird1 |
It sounds like tire profile to me. I like to run continental race attack endurance. It feels much more crisp than even there road attack, I put them up next to each other and the race attack was a lot steeper on the lean angle rate and was much more fun. The road attack was kind of slow moving as the curve was more dull than the race attack. It was noticeable immediately! I have been using the pm wheels. I did notice that in the front i cannot hit the last 1" of the tire with the road attacks...Even with a rear race attack. Now i could go all the way to the edge on the the race attacks front and rear. I was amazed by this silly little change, That made a huge difference. | ||
| Buelleaver |
Interesting thread here. I just put a 180 Diablo Strada on my bike. The last tire was a 170 strada. Same tire different size. Driven the same. PM wheels. I think the 180 feels better, but The 180 has a much smaller chicken stripe. (almost none). I’m not sure why. Maybe the 180 has a bigger contact patch. Not sure if this is a good thing. | ||
| 14d |
Good (but short) article on tire sizes http://www.sportrider.com/tech/tires/146_0206_tire _size/index.html I'm running the Corsa III's on my PMs and love em. The 180 in the back has maybe a quarter inch of strip left, the front about 3/4's. To get any more off I'd have to drag a knee (saving first time for the track). +1 on what a big difference tires can make. Bike came with a mismatched worn pair, when I put the new ones on it was a totally different ride, night and day difference. | ||
| Dpg |
Isn't a 180 the correct size for the PM rims since they are 1/2" wider than the cast wheels? I know the first time I had a shop install the 180 Dunlop the tech said he had a really hard time getting the tire on. 180 on an X1 is standard versus a 170 on the M2. I've been buying tires based mostly on mileage. Getting around 5K miles on a rear and the front was good for 10K. Rears wear out in the middle for the most part. Safe ride, Gary, DPG | ||
| Pkforbes87 |
Dpg - recommended tire size isn't different between bikes. Its different between wheels. 170 for the 5" wide cast, 180 for the 5.5" wide PM's. Forgot I'd have to adjust suspension when changing unsprung weight front and rear  I'm taking Betty through the military sportbike course today so hopefully ill get the chance to have the suspenders all sorted out by the end of the day. | ||
| Jramsey |
Actual tire size varies somewhat between manufacturers. Both my bikes have PM's, one has a 180/55 Diablo Strada the other has a 170/60 Qualifier and the 180 measures 1/8" narrower then the 170. | ||
| Mobile |
My 2002 X1 has PM Wheels with a D207 that is a 170/60. I was really surprised because I knew the 5" cast wheel had the 170, and a lot of Jap bikes had a 180 on a 5.5". I put a qualifier on the front this spring, and was really thinking of going with a 180/55 qualifier now. Any one see any reason not to? Thanks, Chad | ||
| Preybird1 |
I forgot to mention i am using the 1805517 | ||
| Rick_a |
This was my answer in another thread: I have a 190 on my PM wheeled S1. It pinches the profile in a bit and requires more effort to get a full lean. The center will wear quicker as well. I think it would work better on the track than street, as the side grip and stability at high lean angles seem a little better. If you have a 3/8" of belt clearance or more I think you'd be fine. The front and rear will have the same size chicken strips so you'll have to work harder to rid yourself of them. With a 180 my front would have 1/2" chicken strips while the rear was worn completely to the edges. Overall, if the 190 wasn't free, I'd be using a 180 instead. | ||
| Essmjay |
On my S2, last summer I put on Diablo Strada in a 170 on my PM's because the rims had Pilot Sport in a 170 already on them, so I ordered the same size without checking the manual. Then I rode to the RoundupintheRockies and a couple other rides, and now have about 6000 miles on the Stradas. They felt fine, what issues are there in using the 170 instead of the 180? It was really hard to get the 170 onto the rim, would the 180 go on easier? It sounds like I should order a 180 next time? | ||
| Phelan |
A 180 would be easier, I think, to fit onto the 5.5" rim. | ||
| Jramsey |
What was hard about getting the OEM spec. 170/60 on the rim? | ||
| Buell_bert |
Wider tires usually go on harder for a specific rim size. Also the rubber hardness does make a big difference. But why not just get the proper tire size for the rim you wish to use. (Message edited by Buell_Bert on September 11, 2009) | ||
| Loki |
Something to note about the M3. It is a triple radius profile tire on the rear. The front is a double radius. Really sensitive to tire pressure also. | ||
| Beachbuell |
I run a 180 Scorpion Sync on my M2 cast wheels. | ||
| Pkforbes87 |
I really liked the feel of the 180 sync on cast wheels. Since my Strada front still has plenty of life left I think I'll try replacing the worn Strada 170 rear with a Strada 180 rear and see how they compare. Hopefully I'll get more life out of the rear this time.. only got about 5500 out of the Strada 170. But I unknowingly put about 500 of those miles on it with 24 psi so I'm sure it could have lasted longer. |
