Tyre size question

Bubb · Jan 6, 2022

I know the “which tyre” has been done to death…

This is slightly different.

I know the correct size tyre for the rear of a r80g/s is 4.00 x18, but my question is; will a 4.10 x 18 fit on the rear of a r80g/s? (Or the rear of my gs’ d R80ST.)

Reason being, continental conti escape is available in 4.10 x18, but doesn’t seem to be available in 4.00 x18, and I wondered if the larger tyre would be okay.

Thanks all, and happy new year.

Bubb

scooter paul · Jan 6, 2022

I’ve no personal experience but a google search reveals a 4.10 x 18 to be equivalent to a 350 x 18. Another description I found says ‘ equivalent to a 400 x 18 but with a low profile’. Either way would indicate it’s not too wide.

Bubb · Jan 6, 2022

Thanks paul

tuftywhite · Jan 6, 2022

As I understand it, it's 4 inches, and 4.1 would be about 104mm. I've had a chunky 110 rear tyre which was useable but rubbed the swinging arm.

I reckon you'd probably get away with it, but I wouldn't let mine be the final say so.

Bubb · Jan 6, 2022

Tufty

Thanks for the reply. I think the best option for me is to ignore the idea, and stick to a proper sized tyre (4.00, I’m thinking of using metzeler enduro Sahara 3)…. Rather than try something which is not specified for the bike, and may cost me more cash when I have to re-lace it when it’s not right.

I will leave it for someone else to do the experiment.

Thanks to you both (ScooterPaul, and Tufty) for taking the time to reply.

Bubb

barny · Jan 8, 2022

Bubb just keep an eye on the shock, I have found that to be the tight spot in the past. You can gain a little (2mm) using a K series rear wheel spacer on a 4 stud wheel, the off-set is minimal.

bernardofeio · Jan 11, 2022

I'm using 130/80 tires (TKC, Michelin Anakee wild, Mitas 09, ...) and they are usable depending on the rim offset (small rubbing). Sometimes I'm also using 140/80 tires (Michelin desert) but theses ones need some trimming

I use 1mm shims between the hub and the rim to adjust the offset (similar to what is done in the K motorbikes)

ps: I learned that not all G/S rims have the same offset. Some time ago I bought another rear rim and it had a difference of 5mm (in fact good because I wanted to install 140/80 tyres)
pps: the early rims for the G/S where 2.15inches wide and the last 2.5inches

mikeyboy · Jan 11, 2022

bernardofeio said:
I'm using 130/80 tires (TKC, Michelin Anakee wild, Mitas 09, ...) and they are usable depending on the rim offset (small rubbing). Sometimes I'm also using 140/80 tires (Michelin desert) but theses ones need some trimming

I use 1mm shims between the hub and the rim to adjust the offset (similar to what is done in the K motorbikes)

ps: I learned that not all G/S rims have the same offset. Some time ago I bought another rear rim and it had a difference of 5mm (in fact good because I wanted to install 140/80 tyres)
pps: the early rims for the G/S where 2.15inches wide and the last 2.5inches

Maybe of interest to someone,
I have a new old stock 2.5” rim
In lovely condition obviously.
Rocking horse poo

Beemerboff · Jan 11, 2022

Your choice of shock comes into it too, as as it has already been pointed out.

Enduro 3 Saharas are the best tire I have had on my G/S, Mitas E07s not far behind and the last a good bit longer.
Not always a lot of choice in sizes in Oz, so I use either 4" or 110 which rubs slightly on an Ohlins in certain circumstances when I am riding, but not at rest.
FWIW on the hard pack gravel roads I ride on a 4" on my warm 1000 CC G/S finds more traction than a 130 on a Funduro.
Prefer the feel of stock size tires on all my airheads, but whatever rocks your boat!

scooter paul · Jan 12, 2022

On my ST G/S hybrid I run a TKC 80 , 120/90 x 18. Loads of clearance on swingarm and WP shock.

oldnfat · Jan 12, 2022

I ran Sahara 3s and liked them both on and off road. However I have TKC70s now and they are much better if you are mainly road riding with the occasional fire track.

Tyre size question

Bubb

Dogsbody

scooter paul

Well-known member

Bubb

Dogsbody

tuftywhite

getting away with it so far!

Bubb

Dogsbody

barny

Well-known member

bernardofeio

Registered user

mikeyboy

Well-known member

Beemerboff

Registered user

scooter paul

Well-known member

oldnfat

Well-known member

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