Britbike forum

Classic British SparesKlempf British PartsBaxter CycleBritBike Sponsor SteadfastCyclesThe Bonneville ShopLowbrow CustomsGirling Classic MotorcycleLucas Classic MotorcycleHepolite PistonsIndustrial tec supply Classic Bike Parts Cheshire

Upgrade Your membership! Premium Membership Gold Membership Vendor Membership

New Sponsor post
New FAQ post
Manuals on DVD - Buy 4 for 3
All 4 DVD Manual
Member Spotlight
Bob Fletcher
Bob Fletcher
Calif-- Santa Barbara
Posts: 192
Joined: November 2015
ShoutChat
Comment Guidelines: Do post respectful and insightful comments. Don't flame, hate, spam.
Top Posters(30 Days)
quinten 69
Top Likes Received (30 Days)
quinten 27
NickL 26
Newest Members
Templarian, doug_chambers, NRpolo, Ianc15, chuckhaz
12,120 Registered Users
Who's Online Now
6 members (Tridentman, Mark Parker, linker48x, Mark Brown, Magnetoman, TR6Ray), 23 guests, and 22 robots.
Key: Admin, Global Mod, Mod
Forum Statistics
Forums35
Topics76,052
Posts769,398
Members12,120
Most Online151
May 8th, 2022
Previous Thread
Next Thread
Print Thread
#832507 12/07/20 9:56 am
Joined: Sep 2020
Posts: 280
Likes: 31
Kev Ev Offline OP
Britbike forum member
OP Offline
Britbike forum member
Joined: Sep 2020
Posts: 280
Likes: 31
I am thinking of putting Avon Roadrider Mk2 tyres on my 1966 A65 Lightning.

I've only ever ridden it before with K70's on, with the standard sizes of 3.25x19 front and 4.00x18 rear.

I have read lots of reviews on the Avon Roadrider Mk2 which, as usual, are full of contradictions. The majority are good but there are a few that claim they suffer from 'structural failure'?

I'm not planning on doing any knee down riding on my Lightning. As well as getting too old for it I know, from my past experiences on the bike, that the main stand and foot rests will hit the deck before my knees do and I wouldn't want to damage anything that I've spent a lot of time and money on restoring.

I'm sure there are must be plenty on here who have used this tyre and would appreciate any feedback you can give me.

Thank you,

Kev E

Last edited by Kevin E; 12/07/20 10:19 am.
BSA on eBay
Joined: Aug 2015
Posts: 1,881
Likes: 76
A
Britbike forum member
Offline
Britbike forum member
A
Joined: Aug 2015
Posts: 1,881
Likes: 76
I believe there was a problem with the tread splitting in a batch of Roadriders (Mk1) produced in 2013


BSA B31 500 "Stargazer"
Greeves 200 "Blue Meanie"
Greeves 350
Greeves 360
GM500 sprint bike "Deofol"
Rickman Jawa 500 "Llareggub"
'35 & '36 OK Supreme
Kawasaki ZZR1400 "Kuro No Senshi"
Kawasaki Ninja H2 "Fujin"
1 member likes this: Kev Ev
Joined: Aug 2001
Posts: 6,030
Likes: 244
G
Britbike forum member
Offline
Britbike forum member
G
Joined: Aug 2001
Posts: 6,030
Likes: 244
Road Riders for me, used several sets, no failures, a rear last about 3,000 miles, fronts a lot longer.
I havent ridden a bike with K70s fitted since the 1970s so cant comment on A B comparisons. If someone offered me a ride on a bike with K70s now I would probably decline it, never liked them.maybe the rubber has changed over the years.


71 Devimead, John Hill, John Holmes A65 750
56 Norbsa 68 Longstroke A65
Cagiva Raptor 650
MZ TS 250
The poster formerly known as Pod
1 member likes this: Kev Ev
Joined: Aug 2006
Posts: 1,595
Likes: 78
Life member
Offline
Life member
Joined: Aug 2006
Posts: 1,595
Likes: 78
In my opinion the only drawback to Roadriders is if you ride straight up and down most of the time. Center wears and you have a square tire. Not that K70s didn't do that as well. Rode quite a lot on them in the past and the only strong point I can mention is they are fine on gravel roads. Plus having that "original" look I guess. I may drift away from the RRs on the rear and go for a dual compound. Main road blasting to the fun roads.


69 A65T
71 B50T
85 K100RS
54/59 A10SR
69 B44VS
71 A65FS
95 Trident
Too much moderation is bad for you.

Joined: May 2013
Posts: 8,612
Likes: 243
A
Britbike forum member
Offline
Britbike forum member
A
Joined: May 2013
Posts: 8,612
Likes: 243
Interesting Gavin, I got 3000 out of a K70 (3500 at a push but it was weaving a lot by then) the last roadrider I had was still fine at 6000 miles, although shortly after I had an issue where the back wheel locked and that gave me a nice wear patch down to the chord so it needed swapping.

Road Riders are a great tyre! I've only used the Mk1 up to now, although have some Mk2's for the OIF which are waiting to be fitted.

The only criticism I have with the road rider vs the K70 is the K70 was still a half decent tyre for trail work (the RoadRider isn't) the K70 also isn't a bad tyre. On the right bike it will handle well (my Canam 250 was great with them on, but it also handled well on tight bends with trials tyres on) they just don't suit the A65 as well as Roadriders do.


Now let’s all have a beer beerchug

68’ A65 Lightning “clubman”
71’ A65 823 Thunderbolt (now rebuilt)
67’ D10 sportsman (undergoing restoration)
68’ D14 trials (undergoing transformation)

Joined: Feb 2007
Posts: 2,819
Likes: 107
Britbike forum member
Offline
Britbike forum member
Joined: Feb 2007
Posts: 2,819
Likes: 107
I've had good luck with Roadriders MK1s on multiple bikes over the years. There are a bunch of people Racing on the street versions. Nobody has ever mentioned anything about one coming apart. If by chance you prov this wrong and get one that goes bad, Avon is a reputable company and I'm sure they will want to help you out. But if your worried why not call them up and ask them?

I have a similar relationship with Michelin USA. Years ago I put the wrong Macadam tire (the one they recommended) on my BMW R65. Michelin set me a credit with which I bought the right sized tire and told me to keep the wrong one. Unfortunately for me, this tire hanging on a wall caused me to build a motorcycle around it!

Last edited by Semper Gumby; 12/07/20 5:07 pm.
Joined: Aug 2001
Posts: 6,030
Likes: 244
G
Britbike forum member
Offline
Britbike forum member
G
Joined: Aug 2001
Posts: 6,030
Likes: 244
The trick to equalising wear on the rear is to accelerate hard out of corners, they dont last any longer but it stops them flattening quite so badly.YMMV


71 Devimead, John Hill, John Holmes A65 750
56 Norbsa 68 Longstroke A65
Cagiva Raptor 650
MZ TS 250
The poster formerly known as Pod
Joined: Aug 2001
Posts: 9,055
Likes: 162
T
Britbike forum member
Offline
Britbike forum member
T
Joined: Aug 2001
Posts: 9,055
Likes: 162
Originally Posted by gavin eisler
The trick to equalising wear on the rear is to accelerate hard out of corners, they dont last any longer but it stops them flattening quite so badly.YMMV

And if that makes you perform a highside, wear on the top and side of the bike will also equalise.


Amateur Loctite enthusiast.
1 member likes this: gavin eisler
Joined: Oct 2008
Posts: 7,702
Likes: 241
Britbike forum member
Offline
Britbike forum member
Joined: Oct 2008
Posts: 7,702
Likes: 241
I've been using the Road Riders for years now. Can't say what's the difference between Mk1 and Mk2.
I've never used K70, but I can say that the RRs compare favorably to K81 Dunlops.


It's not a bug, it's 'character.'

72 T120V cafe project "Mr. Jim"
72 T150V "Wotan"
92 BMW K100rs "Gustav"
Joined: Sep 2020
Posts: 280
Likes: 31
Kev Ev Offline OP
Britbike forum member
OP Offline
Britbike forum member
Joined: Sep 2020
Posts: 280
Likes: 31
Thanks for all your comments chaps.

I will give the Avon Road riders a go.

Joined: Dec 2004
Posts: 11,623
Likes: 251
Britbike forum member
Offline
Britbike forum member
Joined: Dec 2004
Posts: 11,623
Likes: 251
According to Avon the MK2 is better than the MK1 in the wet, never had an issue with the MK1 in the wet but will no object to being even better.

Joined: Sep 2015
Posts: 366
J
Britbike forum member
Offline
Britbike forum member
J
Joined: Sep 2015
Posts: 366
I/ve used Dunlop TT 100 since when they first came out on my BSA Gold Star and have found them to be really good whatever your riding style

Joined: Sep 2020
Posts: 280
Likes: 31
Kev Ev Offline OP
Britbike forum member
OP Offline
Britbike forum member
Joined: Sep 2020
Posts: 280
Likes: 31
Originally Posted by John Alexander
I/ve used Dunlop TT 100 since when they first came out on my BSA Gold Star and have found them to be really good whatever your riding style

Hi John,

I was considering the TT100 tyre but my only concern there is that they don't have the correct sizes that are standard fitment on the A65.

Joined: Dec 2004
Posts: 11,623
Likes: 251
Britbike forum member
Offline
Britbike forum member
Joined: Dec 2004
Posts: 11,623
Likes: 251
My only ever TT100's came on my Commando when I bought it, went in the bin 2 weeks later with loads of tread left, could not stand the following of road grooves and odd sensation going over white lines.

Joined: Aug 2001
Posts: 6,030
Likes: 244
G
Britbike forum member
Offline
Britbike forum member
G
Joined: Aug 2001
Posts: 6,030
Likes: 244
Originally Posted by kommando
My only ever TT100's came on my Commando when I bought it, went in the bin 2 weeks later with loads of tread left, could not stand the following of road grooves and odd sensation going over white lines.
+1 to that , even Road riders do it a bit once they are worn, I like to change the rear once " white lining" starts. This is usually before they are properly worn , I think its the carcasse flexing about.


71 Devimead, John Hill, John Holmes A65 750
56 Norbsa 68 Longstroke A65
Cagiva Raptor 650
MZ TS 250
The poster formerly known as Pod
Joined: Jun 2002
Posts: 10,470
Likes: 41
S
Britbike forum member
Offline
Britbike forum member
S
Joined: Jun 2002
Posts: 10,470
Likes: 41
Hi Kev,

Originally Posted by Kevin E
1966 A65 Lightning
standard sizes of 3.25x19 front and 4.00x18 rear
only ever ridden it before with K70's
thinking of putting Avon Roadrider Mk2 tyres
Firstly, you'll probably find the Roadriders to be good. Mind, I say "probably" because a motorcycle's a physical anachronism, only viable because of the human sat astride it; the rider keeps it viable based on a set of inputs interpreted by his/her brain; there just isn't any guarantee your brain will interpret every input the same as another human.

Originally Posted by Kevin E
considering the TT100 tyre but my only concern there is that they don't have the correct sizes that are standard fitment on the A65.
However, don't fall into the trap of thinking Roadriders are "the correct size" just because the ones you've looked at have the same numbers moulded on the sidewalls as K70's. Or that TT100's aren't "the correct size" just because you don't see ones with the same numbers moulded on the sidewalls as K70's.

Biggest problem with numbers moulded on sidewalls is they're "section widths" (and, by arcane calculation, "section heights"). How does "section width" relate to the real world? Buggered if I know, and I've been interested in the 'best' tyres for my old heaps for about forty years ...

To decide if your new 'best tyres' (Roadriders?) will actually fit your motorcycle, you need to look at "overall diameters" and "overall widths" - designers of our old heaps weren't generous with spare space around wheels.

When you look certainly on https://www.dunlopmotorcycletires.com/tire-line/K70/ (click on "Explore" | click on "View Specs") and https://www.avontyres.com/en-gb/tyres/roadrider-mkii?cartype=motorcycle, you'll see K70's and Roadriders with same numbers moulded on the sidewalls are not actually the same real-world sizes at all ... particularly the widths. frown

When comparing, also bear in mind overall widths are based on the tyre mounted on the maker's recommended rim width for the tyre size, this will almost always be one width greater than the rims on your bike; in case you're wondering, the WM2 on the front of your bike is equivalent to 1.85, the WM3(?) on the rear of your bike is equivalent to 2.15.

Then even if, say, the 3.25 Roadrider will fit between your bike's fork legs, fatter tyres don't always make a better-handling bike - your bike is light and very low-powered compared to some of the 1980's Japanese bikes that also use V-rated tyres.

Finally here, whatever you fit, risking telling you something you know already, don't use the recommended tyre pressures in a '66 manual; modern tyres (and that applies to the K70 pressures) start at 28 psi/~2 bar front, 32 psi/~2.2/2.3 bar rear.

Hth.

Regards,

1 member likes this: gavin eisler

Moderated by  Allan G, Jon W. Whitley 

Link Copied to Clipboard
British Cycle SupplyMorries PlaceKlempf British PartsBSA Unit SinglesPodtronicVintage MagazineBritBike SponsorBritish Tools & FastenersBritBike Sponsor






© 1996-2022 britbike.com
Powered by UBB.threads™ PHP Forum Software 7.7.5