tire choices

CanukNortonNut · Aug 31, 2014

I have the same as Fullauto and Al-otment using the 19" Morad WM4 rim front and back matched with the AM26 universals 100/90. You can get away with this on an 850 front fender, but not the early 750's or a CNW fender. You will have interference issues. When the rear tire wear-bar line disappears I switch the front tire to the back and place a new skin on the front. These work brilliantly in the rain as well. Not that I like riding in it.

I hate cleaning my bike after. :roll: The bike tracks well and I can take my hands off the bars at speed without any wobble what so ever.
Tom
CNN

Hobot · Aug 31, 2014

Duh, over 45 mph the wheel gryro's allow about any bike to go hands off with a bit of body English to compensate for road crown and wind, so best way to monitor state of tires is see how slow it goes hands both before survival reflex makes ya grab on again.

CanukNortonNut · Aug 31, 2014

The AM26 also behave well over tar snakes and grated bridges. TT100's tended to be a little squirrelly. :shock:
What is the consensus of the group here running for tire pressure with the modern skin. I'm 180lbs with leathers and skidlid on and I run 32 front 34psi rear?
I have seen some tire threads that showed cracking on the AM26 but I have never experienced this problem. My tires are always fresh (less than 5 years old from manufacture date).
CNN

Hobot · Aug 31, 2014

32 front 34psi rear? Sounds pretty close but can fine tune for the surface texture up/dn till sense of steering becomes the easiest neutral feeling. I've gone up/dn on the ff/rr diferences both on purpose and d/t slow leaks to find I alway settle on 2 lb difference about regardless of total pressure. While in the mood its very educational to try extra low air in one tire then another then both at once and never ever forget the rather subtle sense of annoyance before leaks blow out. Also very similar to handling like a racer on edge.

Fast Eddie · Aug 31, 2014

CanukNortonNut said:
I have the same as Fullauto and Al-otment using the 19" Morad WM4 rim front and back matched with the AM26 universals 100/90. You can get away with this on an 850 front fender, but not the early 750's or a CNW fender. You will have interference issues. When the rear tire wear-bar line disappears I switch the front tire to the back and place a new skin on the front. These work brilliantly in the rain as well. Not that I like riding in it. I hate cleaning my bike after. :roll: The bike tracks well and I can take my hands off the bars at speed without any wobble what so ever.
Tom
CNN

Thought I'd just confirm, a 100/90 Roadriders on a 2.5" (wm4) rim does fit inside a CNW front mudguard. Well, it does on mine at least.

CanukNortonNut · Aug 31, 2014

Fast Eddie said:
CanukNortonNut said:

I have the same as Fullauto and Al-otment using the 19" Morad WM4 rim front and back matched with the AM26 universals 100/90. You can get away with this on an 850 front fender, but not the early 750's or a CNW fender. You will have interference issues. When the rear tire wear-bar line disappears I switch the front tire to the back and place a new skin on the front. These work brilliantly in the rain as well. Not that I like riding in it. I hate cleaning my bike after. :roll: The bike tracks well and I can take my hands off the bars at speed without any wobble what so ever.
Tom
CNN

Click to expand...

Thought I'd just confirm, a 100/90 Roadriders on a 2.5" (wm4) rim does fit inside a CNW front mudguard. Well, it does on mine at least.

Well that's good news because I always like the CNW front fender.
Thanks for the comments Fast Eddie. I just got back from a 2-hour (fix) road ride on the Snorton. I’m all better now. :wink: Oh and I think that makes 4 of us using 19" WM-4 rims on our Commandos.
Cheers,
Thomas
CNN

Fast Eddie · Sep 1, 2014

CanukNortonNut said:
Fast Eddie said:

CanukNortonNut said:

I have the same as Fullauto and Al-otment using the 19" Morad WM4 rim front and back matched with the AM26 universals 100/90. You can get away with this on an 850 front fender, but not the early 750's or a CNW fender. You will have interference issues. When the rear tire wear-bar line disappears I switch the front tire to the back and place a new skin on the front. These work brilliantly in the rain as well. Not that I like riding in it. I hate cleaning my bike after. :roll: The bike tracks well and I can take my hands off the bars at speed without any wobble what so ever.
Tom
CNN

Click to expand...

Thought I'd just confirm, a 100/90 Roadriders on a 2.5" (wm4) rim does fit inside a CNW front mudguard. Well, it does on mine at least.

Click to expand...

Well that's good news because I always like the CNW front fender.
Thanks for the comments Fast Eddie. I just got back from a 2-hour (fix) road ride on the Snorton. I’m all better now. :wink: Oh and I think that makes 4 of us using 19" WM-4 rims on our Commandos.
Cheers,
Thomas
CNN

Only 4!? It is the correct rim size according to Avon, and they should know!

CanukNortonNut · Sep 1, 2014

Fast Eddie said:
Only 4!? It is the correct rim size according to Avon, and they should know!

F E,
Well unless more of us pipe up. I think that's about it for members using the WM4 19” front and back. I think most are still using the WM2's that came with their bike or switched to WM3's. I would have liked the shouldered rims but Morad or any other rim maker that I found would'nt make them in 19"
I still like what I got. Here is an old thread which shows how much of a tire profile change happen to the footprint between WM2 and WM4 for comparison.

Advice on replacement rims

Hi All I have a 75 MK3 that needs new rims, the original ones are bent I would like to retain as stock appearance as possible I know about the Sun and Excel alloy rims and the SS, chrome and Elite chrome from CWC I would be interested in other peoples experiences and opinions, particularly the...

www.accessnorton.com

Cheers,
Tom
CNN

worntorn · Sep 1, 2014

Nater_Potater said:
bluto said:

Be aware that Avon AM26 100/90-19 is NOT recommended by Avon for the stock WM2 rims...

Click to expand...

Good catch on my oversight! I failed to mention that a 90/90-19 resides on the front end. WM-3 X 18 on the rear, so it's shod with the 100/90-18.

Nathan

Nathan, if at some point you want a bigger rear tire with deep tread and big payload, the Avon Roadrider 4:00 x18 is a bit of a weird duck in this day of metric sizes, but is listed as OK to fit on a wm3 rim. It has a 64 weight rating as opposed to 57 for the 100/90 tires. This used to mean 640 pounds vs 570, but all of those numbers have shifted a little lower. Still roughly the same 70 pounds extra carrying capacity tho.
Nice and wide too, if you like width. It is in between a 110 and a 120 for width.
As far as the tread goes, the 100/90/19 s are a Universal whereas the 400x 18 is specifically a rear tire, so it has greater tread depth. I learned this recently from Fast Eddie.
I wondered why my switch to a 400x 18 rear from a 100/90/19 universal tire on the Vincent has improved tire mileage 50% with the same brand and model of tire, Avon Roadrider. Part of it is the extra width, the rest is due to the greater tread depth.

I recently switched to new Morad /Akront flanged alloys for the Commando and was looking for Wm 4 in that profile. I was told that they were going to be available in the coming months, however no firm date was given so I went with wm3 s, which get the job done.

Glen

Fast Eddie · Sep 1, 2014

worntorn said:
Nater_Potater said:

bluto said:

Be aware that Avon AM26 100/90-19 is NOT recommended by Avon for the stock WM2 rims...

Click to expand...

Good catch on my oversight! I failed to mention that a 90/90-19 resides on the front end. WM-3 X 18 on the rear, so it's shod with the 100/90-18.

Nathan

Click to expand...

Nathan, if at some point you want a bigger rear tire with deep tread and big payload, the Avon Roadrider 4:00 x18 is a bit of a weird duck in this day of metric sizes, but is listed as OK to fit on a wm3 rim. It has a 64 weight rating as opposed to 57 for the 100/90 tires. This used to mean 640 pounds vs 570, but all of those numbers have shifted a little lower. Still roughly the same 70 pounds extra carrying capacity tho.
Nice and wide too, if you like width. It is in between a 110 and a 120 for width.
As far as the tread goes, the 100/90/19 s are a Universal whereas the 400x 18 is specifically a rear tire, so it has greater tread depth. I learned this recently from Fast Eddie.
I wondered why my switch to a 400x 18 rear from a 100/90/19 universal tire on the Vincent has improved tire mileage 50% with the same brand and model of tire, Avon Roadrider. Part of it is the extra width, the rest is due to the greater tread depth.

I recently switched to new Morad /Akront flanged alloys for the Commando and was looking for Wm 4 in that profile. I was told that they were going to be available in the coming months, however no firm date was given so I went with wm3 s, which get the job done.

Glen

I run the 400 x 18 on my Vincent and Commando. On the Commando I went with the wm4 rim. I run the 100/90/19 in the front of the Commando, I like the fact that both tyres have exactly the same diameter! I've wm4s front and rear and they definitely feel excellent to me.

Hobot · Sep 1, 2014

Remember what ole Burt Munroe said about 5 min on a ride like his being worth much longer time on the ordinary, so same thing with super soft fast wearing tires, got to try it at least once in your life time to taste the lasting joys long after tires soon used up. The most wild eye'd Kelly George got on reviewing his winning flat tracker features was mentioning the trills of a street fighter with the super soft dirt tires. My basic rule is if tire loading groin tightening sonics occurs too easy then go up a size or lower pressure, if not then reduce size &or up PSI. Still about nothing matters more to me going about fast or pulling down short than tire softness. I'm sold on peaky profiles and a bit less mass of narrower rims, as long as air pressure allows similar patch widths.

Nater_Potater · Sep 4, 2014

worntorn said:
Nathan, if at some point you want a bigger rear tire with deep tread and big payload, the Avon Roadrider 4:00 x18 is a bit of a weird duck in this day of metric sizes, but is listed as OK to fit on a wm3 rim. It has a 64 weight rating as opposed to 57 for the 100/90 tires. This used to mean 640 pounds vs 570, but all of those numbers have shifted a little lower. Still roughly the same 70 pounds extra carrying capacity tho.
Nice and wide too, if you like width. It is in between a 110 and a 120 for width.
As far as the tread goes, the 100/90/19 s are a Universal whereas the 400x 18 is specifically a rear tire, so it has greater tread depth. I learned this recently from Fast Eddie.
I wondered why my switch to a 400x 18 rear from a 100/90/19 universal tire on the Vincent has improved tire mileage 50% with the same brand and model of tire, Avon Roadrider. Part of it is the extra width, the rest is due to the greater tread depth.

I recently switched to new Morad /Akront flanged alloys for the Commando and was looking for Wm 4 in that profile. I was told that they were going to be available in the coming months, however no firm date was given so I went with wm3 s, which get the job done.

Glen

Very good information; thank you! I pulled a thirty-year-old Dunlop Touring Elite off the back during the resurrection, and debated which way to go with a replacement tire. Once the 100/90-18 Avon wears thin, I'll probably go with the bigger skin. That is, unless the current tire shows decent wear characteristics; it handles so well right now that I wouldn't want to upset some delicate balance of front-to-rear tire widths!

Nathan

Hobot · Sep 4, 2014

On Peel I liked the 120x18" WM3 best for more side traction on THE Gravel and more mileage getting on it every time I could, but unless very good power on tap its more a drag than benefit and is a squeeze to get past mud guard and drum and cushion paddles at same time. There's about 1000 miles more mileage out of each size up if often enjoying Cdo torque responses and far over leans often. There are long historic hard use examples of tire to rim that's off the legal charts though of course most may not like the way it feels.

tire choices

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