Talk Morgan Forums Morgan Sports Cars Morgan Three Wheeler & Super 3 Disc brake rear wheel

Hi all.
what’s the best way to remove a rear wheel fitted with the M3W Services disc brake conversion?,also, does the disc or drive belt sprocket need to be removed before taking the wheel to have a new tyre fitted?.

If you have a mudguard remove it, jack the car up, undo the axle nut, undo the 2 tension adjusters, slide the rear wheel forward to remove the drive belt from the rear sprocket the rear wheel assembly can then be slid rear wards out of the swing arm.

There should be enough slack in the hydraulic brake hose and hand brake cable to just lie the wheel assembly under the car, you may need to undo a couple of clips holding the brake hose and the cable. If you can’t do this then you will have to disconnect both the hydraulic hose and the hand brake cable to remove the wheel assembly.

Whichever option you choose you will then need to remove the drive sprocket from the hub and then the wheel from the hub, you do not need to remove the disc.

Right got it, many thanks.

It's handy to have an impact driver for removing the sprocket bolts (8mm hex) and the wheel nuts (17mm),
When re-fitting:
Wheel nuts: 108Nm (80 lb/ft)
Sprocket bolts: 95Nm (70 lb/ft) + 'blue' Loctite

Thanks Bunny, I just need to decide which tyre to go for.
I used to be undecided, but now I’m not so sure 🤔

Have you seen Ian Brett's Alternative Parts List? This is from the current list and you can't go far wrong with any of these. Don't forget the puncture prevention 'goop' when your new tyre has been fitted.

Rear tyre:
o Yokohama Blue Earth 2 (OEM fit)175/65-R15 84H
o Michelin Cross Climate2 4Season
o Bridgestone Weather Control A005 4Season
o Kumho Solus HA32 4Season
o Pirelli All Season
o Yokohama Blue Earth 4S. AW21
o Hankook Kinergy 4S2
o Avon AS7 All Season
o Dunlop SP Sport Blue Response
o Kumho KH27 Ecowing ESO1
o Avon CR6ZZ (for comp use)

o Don’t use Goodyear Vector 4Season, sidewall is wide and hits drive belt.
o Ensure a short valve stem Is fitted as belt will remove a long valve stem!
o OKO tyre sealant:170749717059 (1.25L) Puncture preventative sealant
o Puncture Safe and AutoSeal are similar to OKO

Well that narrows it down a bit!..🤣

If you drive in the autumn/winter then I'd strongly suggest going for one of the all season options. I'm now on my 3rd Michelin Cross Climate and think it's a good option.

Thanks Chris.

The Bridgestone A005 4 Season is a good choice and the sidewall is not on the wide side, so good for the drive belt clearance as well as grip and wear. Good as the Michelin Cross Climate is for wear and grip, it is slightly fatter on the sidewall (but just OK) and will run very close to the drive belt, if it is tracked correctly. From experience the Kumho is also "slim", good grip and usually cheap but wears out pretty quick.

As the APL says, the Goodyear is a bit too fat and rubs the drive belt, avoid it. Not all 175/65-15 tyres are equal..... Some MOT checkers don't like the idea of asymmetric tyres on the back of a M3W, the 4 Season tyres are usually symmetrical tread so a good choice for that as well as combating aquaplaning, which is something you don't want with a M3W. With that in mind, don't run your back tyre down to the bare minimum, if in doubt, replace it. You also don't want a flat, so add some Puncture Safe or OKO.