'78 R100 Rear Tire Replacement

[dbrouss]

I've had a 1978 R100/7 now for 2 years and need to replace the rear tire. Manual calls out a 4.00H18 size. I've also seen where manufacturers will list 120/90-18 or even 110/90-18. Note, I have the light alloy wheels vs spokes if that natters. The list of available tires that I've found so far are:

1) Metzeler Roadtek 01 - R/4.00-18 M/C 64V TL
2) Dunlop D404 - 110/90-18 61H
3) Michelin Road Classic - 4.00B18 64H
4a) Continental ContiGo - 4.00-18 M/C 64H TL
4b) Continental RB2/K112 - 4.00-18 M/C 64H TL
4c) Continental ContiClassicAttack - 110/90 R M/C 61 V TL

Some are the classic older tire design and some have the newer. I'm looking for a good all around tire with reasonable tire longevity. I'm not that hot rod guy anymore now that I've survived to be this old. Given the list above, or even off the list, does anyone have any suggestions? Thanks, Dane

 

[20774]

Welcome to the forum, Dane! My suggestion is to stay with the inch-sized tires. The metric tires have a lower profile and smaller radius which changes the geometry of the suspension and also can create problems with the side and center stand. DAMHIK!!

 

[m_stock10506]

I’ll agree strongly with Kurt, regarding the choice of the original inch size tires. From your list, I would choose the Michelin Road Classic 4.00-18. I would also check for the Avon Roadrider MKII, also in the inch sizes.

 

[dbrouss]

Welcome to the forum, Dane! My suggestion is to stay with the inch-sized tires. The metric tires have a lower profile and smaller radius which changes the geometry of the suspension and also can create problems with the side and center stand. DAMHIK!!

Thanks for the advice!

 

[dbrouss]

I’ll agree strongly with Kurt, regarding the choice of the original inch size tires. From your list, I would choose the Michelin Road Classic 4.00-18. I would also check for the Avon Roadrider MKII, also in the inch sizes.

Appreciate your input and suggested tires! Thanks!

 

[collingsbob]

Maybe a Dunlop K70?

 

[pauls1150]

I've had the RB2/K112 on two bikes long long ago...
The front RB2 was a "WIGGLER" on grated bridges and freeway grooves; maybe they've changed since then.
I liked K112 a lot; while not a super-tire, it handled well and actually saved me from my own mistakes a couple of times.
I've also had the older K70; it was a decent all-around tire (back then) but better traction and handling can be had.

 

[orforester]

+2 on Michelin Road Classic

 

[tlangman4]

Hi Dane!

FWIW, I have the same bike and recently bought the Michelin Road Classics. So far I am very pleased with them..!

 

[lkchris]

There is NOT a metric equivalent to 4.00-18

4.00-18 are available from manufacturers that have made tires for Airheads. Those offering only metric sizes are not making tires for Airheads. They are old, vintage motorcycles ... extra effort finding parts should be expected.

 

[manitou_commando]

Don't go with an over-size thinking that it will increase performance or grip or something.
You will regret it immediately. Oversized tires will dramatically decrease handling.

 

[arhd63]

Don't go with an over-size thinking that it will increase performance or grip or something.
You will regret it immediately. Oversized tires will dramatically decrease handling.

Plus harder to get thru swing arm