Author Topic: Warning: already 2 Germans have bad experience with Michelin Road Classic tyres.  (Read 1357 times)

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Offline Deltarider

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Every now and then I read something on another forum that is so important it needs to be communicated to the international forum, the more when safety is involved.
A member started a new topic in the German forum about his bad experience with Michelin Road Classic tyres. Not much later there was this reply:
"Hi everyone, [...] I'm 59 years old and from Schleswig-Holstein. I've been riding a 500cc K1 since 2010-24, with just under 10.000 km on the odometer. This spring I thought new tyres wouldn't hurt at the start of the season (the old ones were Bridgestone BT45).
I then read reviews and decided on the Michelin Road Classic in 3.25 x 19 and 4.00 x 18. The bike bounced so much between 50-85 km/h that riding was no longer fun. I then installed another new Road Classic, and everything was "fine-balanced and fine-tuned" (including a new wheel bearing, rim centering, spoke tension adjustment, etc.).
The bounce is still there, absolutely no improvement. In the meantime, I've tried new fork oil, progressive springs (Wirth), new stanchions from the aftermarket, and special lubricant to reduce the stickslip [? Can't think of the correct word right now, DR] – all to no avail! Then I installed the Bridgestone Battlax BT46 as my third new tire, and it's been quiet ever since. I also asked Michelin about this and learned that the Road Classic isn't suitable for the CB 500 Four.
Michelin recommends the Active Road or something similar, but since I had concerns, I preferred Bridgestone.
Oh yes, in the meantime, I had installed a friend's complete front wheel to rule out other sources of error, which made the bike run completely vibration-free (it was a Heidenau mounted without any balancing measures)!! So be careful if you are thinking about installing the Michelin Road Classic on a 500cc bike; otherwise, the tyre looks perfect on the bike and rides safely and well, except for the aforementioned speed range."
CB500K2-ED Excel black
"There's enough for everyone's need, not enough for anyone's greed." Mahatma Ghandi

Offline PeWe

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I have had a bouncing front tire,
Heidenau 3.25-19 on my CB750 K2.
I realized after a few attempts that the tire was bad. Too late to contact seller.

I have also had a bouncing Michelin Road Classic. 130/80-18 rear tire. Bad tire and very visible when rotating it.

I contacted the seller that asked me to return the tire. He sent me details  for shipping.  Pickup at my house.
I got a new tire sent to me all without any additional cost for me.

That tire was good as the other Michelin Road Classic  the bike has and had before.

My CB750 K2 has 3.25-19 and 4.0-18
My CB750 K6 has 130/80-18 and 100/90-19.

All works fine.

I have read a similar story about Triumph owner and Michelin Road Classic bouncing tire.

A tire should not bounce on any bike as long as the rim size is correct for the tire size.

I'm sure that any tire brand can  produce bad examples.

EDIT:
My  Road Classic with a sudden runout, 2.5mm on 1/3 of its  circumference was a 130/80-18,  prod date on tire 1722. (Week 17 year 2022)

Good idea to measure the runout with a dial indicator with a magnetic stand. Measure rim only, later on tire to see eventual runout.
There is often a line close to rim that line up when seated correctly.
My did, but had a horrible runout.

Wheel can rotate with help of 2 jackstands
« Last Edit: July 29, 2025, 05:56:28 AM by PeWe »
CB750 K6-76  970cc (Earlier 1005cc JMR Billet block on the shelf waiting for a comeback)
CB750 K2-75 Parts assembled to a stock K2

Updates of the CB750 K6 -1976
http://forums.sohc4.net/index.php/topic,180468.msg2092136.html#msg2092136
The billet block build thread
http://forums.sohc4.net/index.php/topic,49438.msg1863571.html#msg1863571
CB750 K2 -1975  build thread
http://forums.sohc4.net/index.php/topic,168243.msg1948381.html#msg1948381
K2 engine build thread. For a complete CB750 -75
http://forums.sohc4.net/index.php/topic,180088.msg2088008.html#msg2088008
Carb jetting, a long story Mikuni TMR32
http://forums.sohc4.net/index.php/topic,179479.msg2104967.html#msg2104967

Offline seanbarney41

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I got a Road Classic on the rear of my 82 GS1100E.  Balanced up great and has been flawless.
If it works good, it looks good...

Offline MauiK3

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Sounds like some are out of round for some reason, perhaps the mold?
1973 CB 750 K3
10/72 build Z1 Kawasaki

Offline Stev-o

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I have had a bouncing front tire,

+1...it was a old Duro, new IRC cured the issue. No mo' Duro for me....
'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline Mark1976

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I have had a bouncing front tire,
+1...it was a old Duro, new IRC cured the issue. No mo' Duro for me....
Duro's are in fact junk, I've had the same problem with a duro front..
Start with the end in mind...

Offline seanbarney41

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I have had a bouncing front tire,
+1...it was a old Duro, new IRC cured the issue. No mo' Duro for me....
Duro's are in fact junk, I've had the same problem with a duro front..
ummm yeah, but lets also keep in mind that the price of a duro is actually less than half of a Michelin
If it works good, it looks good...

Offline Bodi

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Needing a CB77 tire, 18" small tires not so plentiful, I found a Duro fairly cheap at a swap meet (CVMG Paris). I don't ride that bike a lot, and definitely not pushing its (antique) limits, but have no complaints about the tire.