Radial V. Diagonal

Diagonal.....Is that another word for cross ply or bias belted.
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That what the factory fit to lots of the bikes in production now.

Cross ply front...radial rear.

If its good enough for Triumph its good enough for me.

 

I could not get my head around why the fit them on the front at all.....far as I know.....the majority of bikes have radial back and front.

I do know that cross ply road holding is poor compered to a radial tyre well it was on cars.....they wear out a lot faster than a radial as well.....but Its not just Triumph who fit them on the front.

 

You'd be surprised how many new cross ply bike tyres are available, generally aimed at classic and touring machinery with lower load and speed ratings. I doubt you'll find any cross plys with a W load rating required by many higher performance and sports sports bikes.
If a bike or tyre manufacturer recommends a particular tyre then the spec will be good enough although different brands and tyre patterns don't all behave the same.
Car and bike tyres are made to completely different dynamics so comparisons are meaningless.

 

Cross ply tyres have stiffer sidewalls against radials so it makes sense for steering.

This thread all sounds like a step back in time and I recall the 50p shape tyres first thing on a morning until the sidewalls warmed up on a Landrover many years ago. Better for climbing out of ruts if that's your choice of roads

Radials are far more comfortable.

 

Had crossply on my 1975 Landrover....DUNLOP RK-3....

OK off road but thats all.....road holding...in the wet like driving on ice....used to wander....but the steering was quite a bit lighter than with a radial.

Still have that landrover....bought it new.

But of course the physics of crossplys or bias belted if your in the USA on a bike and a car are very different.

 

Interesting that you have Michelin tyres on the bike currently but the rear is apparently wearing quickly. I recently sold a BMW R1250GS, I put Michelin Road 6s on it and they were still good at 18,000 miles (mostly touring with passenger and luggage), including a tour of Irelands Wild Atlantic Way. So I would recommend fitting a Road 6 to the rear and carry on riding.

 

Tyres have moved on in leaps and bounds, the latest rear sports tyres for example have triple compounds, hard middle, soft on one edge and super soft on the other, touring tyres like Michelin 6s are multi compound and designed for higher mileage. Mixing tyres are a recipe for disaster, you might have got away with it in the 60s and 70s but no longer, remember the contact area on the road for a motorcycle tyre is very small compared to say a car, On a spirited ride the tyre will have as little as 13mm or less contact with the road surface (unless riding straight roads). Tyre choice is what suits a persons riding style, intended use and skills, my personal go to tyre is usually Racetech RRs, but switched to Bridgestone S23s as I got these at cost price as a one off, but do rate them highly. Good luck with whatever tyres you choose.

 

I’m guessing but diagonal is probably just new speaker for cross ply. We do seem to need new words for things these days. It’s almost like the younger ones can’t understand the words we normally use.

 

"Diagonal" refers to the way the numerous plys are laid down across the width of the tyre as opposed to radial tyres where the plys are laid straight across the width at 90 deg. Crossplys were/are also sometimes called bias belted tyres.

 

So are we saying "diagonal", " cross ply", "bias belted" .... is there any more?
Are all the same thing?

I bet the technical guys at these companies yawn whilst the marketing guys get all get excited and go knock one out
Yes, yes, call it that and we'll sell loads as " new technology, super duper, the latest thing that you absolutely need!"

 

It's no different to the hype and sales BS you get from the various oil companies claiming their particular brand is the best for your engine with it's unique and special formulation containing additive X when all you need to know is the grade and the spec.