[RGT]

Firestone ANS 400 x 19 on back, other in 3.25 x 19 on front, they are from Coker. Any feedback is welcome.

[1Blackwolf1]

  I've ran Coker tires before on my Harley Davidson Panheads, they were very good tires for a classic bike.  I'm wondering about the clearance issues on a 4.00" tire on the back, but I have the 350 style fenders on my military model so that would be a little wide probably.

  Will.

[geichal]

I am running a 4" Dunlop on the back and it clears ok.  I don't think I could go much bigger w/out fouling on the swingarm.  That is a sexy tire!
Michael

[ace.cafe]

The rear looks ok, as long as that width will clear the swing-arm. I don't know for sure if it will.

The front tire looks like something off a John Deere tractor.
It's all ribs.
Ribs are good for straight line tracking,but not as good for cornering or braking.
And ribs can be very scary on pavement with rain-grooves cut into it, or on metal bridge gratings.

[Vince]

      This design and the construction techniques used were state of the art in 1935. For appearances on a classic restoration they would look good. As for riding.... These handle like crap. You would do as well to wrap a big rubber band and duct tape around the rim.

[Vince]

     Avon Am 26 is available in 3.25-19 of 90/90-19 for the front About the same width. The 90/90 sits a smidge lower. Rear is the 100/90-19 universal AM 26. Great choice for rubber. They will transform your bike.

[RGT]

I see the AM26 is listed as a tubeless tire, are there any concerns with running a tube in them?
as far as tubes go is there anything secial to look for as far as valve stem? are all the straight up metal ones the same thread? I am assuming I'll go with a heavy duty tube.

Thanks

[Vince]

     Tubeless tires have the "tube" as a coating on the inside of the tire. There is also a difference in the bead area to better fit and hold to the "safety bead" area of the rim. On a tube type spoke rim the tubeless tire bead will fit fine and is held in place by air pressure.
     You can absolutely run a tube in a tubeless tire. There is a caveat, however. Due to higher heat build up and retention you must lower the speed rating and load rating one step. That means that a tire rated for a 600 lb carrying capacity will be downgraded to about 550 lbs. A V-rated tire such as the AM26 Avons will be downgraded from the sustained 150MPH V rating to a sustained 130 MPH H rating.  You are going to have to slow down on your Enfield. Don't go more than 130 MPH for more than a few minutes and you will be OK.
     Tube valve stems are an industry standard. They are all the same size and thread. You probably don't need to go to the extra expense of a "heavy duty" tube. These thicker tubes tend to run hotter. On a street bike this extra heat negates the minor extra puncture resistance. The only place  I have seen  a benefit to heavy duty tubes is in dirt riding through cactus or thistle. it is a little help in fending off these kinds of intruding objects.