Talk Morgan Forums Morgan Sports Cars Morgan Three Wheeler & Super 3 Sprockets and rear tyres, how many miles?

5000 miles, 5mm of tread left on tyre sprocket is starting to look a little worn though but still reasonably quiet.

I've said it before and I'll say it again...if you have a squeaky drive belt try smearing Mr Sheen furniture polish on the belt or sprocket. It works wonders on mine and lasts for hundreds of miles in my experience.

Surprised there is such little interest a lower profile rear tyre

I'm not, says a lot for the intelligence of most five speed owners! The tyre forms part of the suspension and to fit a tyre with a reduced sidewall removes part of the tyre suspension. On a race track with no pot holes, not usually a problem, but in the real world reducing the suspension travel is not the brightest of ideas.

Martin - I'm thinking lower profile rear tyre for hillclimb and sprint (and maybe racing) where lower gearing and reduced sidewall flex would be beneficial.

I'm also interested in the idea of CAT free exhausts for the same reason...

Where did the steel test sprocket come from Chris? Is this a factory job or self sourced?

Ahh, fairy nuff. Is tyre roll/sidewall strength a problem on the rear? I can see the sidewall strength at the front is an issue but for fairly obvious reasons, it's a bit hard to see what is happening at the back.

Possibly the degree of wear of the rear sprocket has something to do with the amount of "squeak" from the belt. There comes a point when Mr Sheen etc. cannot keep things quiet for more than a mile or two and a new sprocket is the only real cure. Hopefully this will all become another problem of the past if the steel sprocket is the cure for the excessive wear rate of the current alloy sprockets. A prematurely worn sprocket that has only lasted a few thousand miles should be a warranty replacement, in my view. Will Morgan try and make it another upgrade that the owner can choose to have, at a cost?

When they finally sorted out part of the steering problem, with a riser, they called it a 'comfort' kit, perhaps they will call a sprocket that will last more than 10,000 miles a 'durable sprocket' upgrade and also charge accordingly? If a customer refuses to pay for the upgrade they will simply replace the worn sprocket with an original one that will wear out in under 4,000 miles again.

Funny, where have I heard of that happening before?

Aww, that's just triggered my "Cynic-O-Meter", Paul..

Can't say I notice a problem with sidewall flex in the rear tyre Martyn, the back end slides around quite easily and also squirms with wheelspin off the start line, which is great fun but not the fastest for acceleration. My main reason is for the lower gearing which might gain me quicker acceleration (if I control the wheelspin) and allow me to make far more use of third gear in hillclimbs and sprints.

I ran out of revs in second gear at Loton Park, but found no gain in changing to third to then very quickly brake and downshift back to second at Triangle bend. Lower gearing might not reduce my times, but if I don't try I wont find out....