best solution for the michelin problem

[Brutus]

Gents, about the tires again. I think I've got the perfect solution. First of all I really want to keep the paso on 16" rims, cause in my perception it's important for the looks of the paso. Furthermore I'd like to keep the rear swing too, cause of it's quality and the excenters. As I've noticed earlier I'm going for the 180/60 ZR16 from Bridgestone (G704). The tire is better than the dunlop 250 and the metzeler 180/60 16".
As alteration I'm going to put the rear wheel offline for 4mm. No problem as BMW's drive around with more than that. This means I have to cut 4mm of the right side (as seen from 'behind'): the aluminium plate and should be no problem. On the other side I'm going to put an extra bushing of 4mm wide and a spacer of 4mm between sprocket and the wheel. On the front nothing changes. That's all! Also Bridgestone delivers an 130/70 ZR16 for the frontwheel. I'll keep you posted.

cheers! Léon

[JWilliam]

I expect the chain will still rub the side of the tyre. I tried an oversize tyre and altough calculation showed that the chain would clear the edge of the tyre in practice it didn't. I got fed up with this and had sliding adjusters replace the standard eccentric by Spondon. This meant that I can fit a 150/80 because the wheel can be moved back another chain link and all the tyre mfrs make a 150/80 ZR 16. Cost £250 and well worth the cost.

[persempre907]

I have never rode with such tires, but it seems to me that someone here told the 150/80 rear tire fits not so good on Pasos.
Ciao

[Brutus]

I expect the chain will still rub the side of the tyre. I tried an oversize tyre and altough calculation showed that the chain would clear the edge of the tyre in practice it didn't. I got fed up with this and had sliding adjusters replace the standard eccentric by Spondon. This meant that I can fit a 150/80 because the wheel can be moved back another chain link and all the tyre mfrs make a 150/80 ZR 16. Cost £250 and well worth the cost.

In theory it should fit. Earlier we've seen a 180/60/16 tire is fitted with an additional 8mm spacer between rearsprocket and wheel. No alterations were made with the front sprocket and the centerline of the rearwheel (centerline as in viewed from the behind of the bike and the tire is exactly in the middle of the bike). Also with the 8mm spacer it seems the tire has 6mm clearance with the chain. So, in theory a 3mm spacer should be enough. Only problem is that in this specific situation the front and rear sprocket are not in line. This means that when the rearwheel is adjusted, the clearance between chain and wheel changes. This could explain your remark. When offsetting the rearwheel, the drive chain stays in one line and alteration of the rear wheel does not affect the distance between chain and tire..
In the end 4mm spacer between sprocket and wheel AND 4mm offset of the rearwheel should do it..!

BTW Should I paint my wheels mattblack or mattgold..?

[Brutus]

See, this image. The rearwheel is a few cm offcenter:


http://www.norrus.net/catalog/popup_ima ... 5f63a4c173

[persempre907]

Now, I understand because BMWs go so bad ...
Ciao

[JWilliam]

I have never rode with such tires, but it seems to me that someone here told the 150/80 rear tire fits not so good on Pasos.
Ciao

The 150/80 is meant for a narrower rim so it spreads out by about 10mm, which is ideal because that makes it a 160. Coupled with a 130/70 front there is plenty of grip and ZR rated. I couldn't hope for a better compromise.

[Skins]

This looks like a good way to go. Can you post a pic of the swingarm with the fittings you are using instead of the eccentrics? And which bike models are the manufacturers making the 150/80 for?

Thanks.

[vee2duc]

Did surch about the the tyre for paso (3,75" + 5.00"). 130/70-16 und 180/60-16 seems to be the best size. Have to talk to the TÜV-engeener (germany). But i hope i can try...

Avon Azaro-ST 130/70-16 > http://www.avon-tyres.co.uk/motorcycle/ ... pecs&id=18
Avon Venom-R 180/60-16 > http://www.avon-tyres.co.uk/motorcycle/ ... specs&id=2

[Duncati]

I was recommended the 180/60 cobra by Avon.

Duncati.

[Skins]

JWilliam you have a PM

[ved]

Hello,

an other solution to keep clearance
http://krueger-junginger.de/assets/images/IMG_2681.jpg

i asked the price - 535€

ved

[JWilliam]

So you don't feel left out, here is a picture of my modded swingarm. The tyre is an Avon Azaro 150/80.

[Skins]

Thanks. So you just have the swing arm chopped off in front of the eccentrics, and have the new units welded on? Is the steering a bit slower with the longer wheelbase?

[JWilliam]

The bigger profile of the rear tyre raises the ride height causing head shake at about 80mph so that means that the steering is quicker but I get around that by having 15psi in the front forks. Spondon do the lot here including sorting the brake calliper mount plate so it really is a slick job and I can be confident that it is a strong as the original weld.