Sammyboy

I had a blowout on the very knackered tyres on my 20 today, and it's time to ante up and buy some new. I'm going to Velox tape them, and replace tubes and tyres, but my question is this. The bike currently wears 20 x 1 3/8 (451) tyres, and obviously has non hooked edge steel rim wheels. Does this mean I need to stick to the low pressure jobbies, like the Schwalbe HS 110 below:


https://www.sjscycles.co.uk/product-S...Tyre-12175.htm

Or can I fit something like Stelvios, which are 20 x 1 1/8. I think I know the answer, specially since I wouldn't be able to inflate them to 120 or anything close on non hooked rims, but I thought I'd ask.

The medium term plan is alloy rims, but not til I can wheelbuild. I've also found the brakes below, which should do the job on 451 or 406, giving me more stopping power.....



https://www.sjscycles.co.uk/product-0...nd-Rear-79.htm

LittlePixel

It's a good question and not one I can answer 'cept to say suck it and see. (Ah the expensive option!)
If it doesn't work you can always keep hold of them and then go one further and get hold of some nice alloy 451 rims.

I have a feeling you might get away with it though as long as you spend time making sure it's seated well. Semi inflate it and give it a good ole massage to ensure evenness and lack of pinching.

Those brakes look nice. I know of someone that did a really nice hack on a Twenty to fit short reach roady brakes, by inserting a wee length of drilled pipe into the bottom of the fork thereby doubling up the caliper hole but about an 3/4 of an inch lower, and enough for some seriously cool braking gear. Very elegant - I plan to steal this idea myself when I go back to rigid forks.

huw

randya

I've mounted Primo Comets on steel Schwinn 451 rims, but it takes a little bit of extra care and patience to get them to seat correctly, it's real easy to get a high spot if you're not careful...alloy rims would be the logical solution, but I haven't bitten the bullet on new wheels yet either...

Edd

I have used those brakes on a pair of Moultons and have been very happy with them.
Edd

Guy Retreau

I'm running 37-451s on my Royal Enfield Revelation. They are simple wheelchair tyres

https://www.wheelchair-ramps.co.uk/ch...-20-1-3-8.html

You can take them up to 60~65psi which is comfortable and supports the average size rider just fine.
The problem with going to narrower and higher pressure tyres is not only securing them to the rim, but the ride quality gets rough considering the Twenty has no frame suspension.

On my five-Twenty I started out with 25-520 tyres, but have since moved to wider and softer 28-520 tyres. There is a noticable improvement in the ride.

Regards, Guy

Sammyboy

I'm not the average person, at 6'3 and 240+ pounds. That said, I'm sure the 60 psi ones will do the job, I just prefer a bit higher pressure.

norfolk bolt

Reply to the first post in this thread, I'd say yes. I have Velocity Aero 451 rims. Before i got my Stelvios in the mail i put the old R20 tyres on the rims to go for a ride. They were an absolute ***** to get on, ridiculously tight. I figured that that the Aero rims were designed for a bmx tyres which can afford a looser fit because of the rim hooks. So I was surprised to have the same problem with the Stelvio. Until I thought why would Schwalbe make a commuter tyre that was a loose fit on the majority of wheels it ended up on...namely steel unhooked 451's. The probable reality is that in Europe that the stelvio tyre goes on far more older steel rims than new aluminium 451's. So yeah, I think you'll have no problem. And it's not as rough a ride as some say here, just stick to smooth parts of the road ;-)
As an aside, if there are 16 pounds in a stone, then mate i think the stelvio is the wrong tyre for you. I'm 11 stone and at 65psi I can still feel the tyre trying to roll out going around some corners (sitting down and at speed) Go for a 406 rim, there are a lot more options in the long run...