19" Motorcycle Wheels vs 26" Bicycle Wheels (rim and tires)

[Rix]

["Rix"]

I was running around 12psi , what do you guys use for off road ?
what do you mean by ID part of the tube?
I have a feeling two holes pinched pretty much the same time within maybe half an hour apart. that tells me it happens often and easily. The holes were not small, by the time I realized it was only 50% pressure left. It is not like I was riding at some construction site with nails and sharps all around, and the only thing I can think of is stone chips that can pinch the tire.
Why the tire liner can not prevent? its between the tire and tube, if something pinch the tire then liner should protect things going further to the tube?!
HD tube might help but its quite heavy[/

Try 18PSI, I know it will be harsher, but you wont flat when center punching rocks and curbs. Pinch flats occur when the tire folds down to the rim, with the tube folding inside to the point it "cracks" and splits along the fold. The tire liner goes between the top of the tube and tire. The tire liner doesn't increase the sidewall rigidity of a tube/tire comb, running higher PSI or a tire with more plys is the only way to increase sidewall rigidity, and that's how you prevent pinch flats when running a tire with a tube.[

I would be surprised if BCTECH pinched flat that tire at 12 PSI. I believe he said he weighs around 135 LBS.

Unless the SHinko 244 sidewalls are weaker than the 241, there is no way I could pinch flat my 241 at 12 PSI. He would have to examine if the holes are spaced apart evenly on the sides.

It is possible he had a slow leak and didn't realize it that brought the tire pressure down really low.

I'd be really surprised if the tire was 12 PSI and he was able to pinch flat it.

Missed this earlier, I feel the same way you do, however, the damage description provided is consistent with pinch flatting. With out a pic, I can't be 100% sure.

 

[Rix]

Wow this thread has become a wealth of knowledge, unfortunatly i dont have the time to search through thw whole thing so excuse me if discussed before.
Im wanting to road register a fat/snow bike in the UK so am looking for some FAT 4" road legal tyres. Its a long shot but wondering if anyone has found anything like this that may fit a 26" rim or even 27.5"?
The closest ive come to is old school 20" motorcycle tyres that fit a 24" bike rim but there are only one or two available and they aren't fat enough?

There are no DOT MC tires I know of that will fit a 27.5 or 26 MTB rim. Yah, a MC 16" tire will fit most 20 bicycle rims, I found a weird MC 20" tire fit a 24 bicycle rim. Someone post a 22"BMX rim fit an 18" MC tire but I haven't confirmed, that myself.

 

[Baron]

For a 24" bike rim, what tire would you guys recommend that's flat resistant with a dual sport tread for both street and offroad? basically the holy grail of 24" tires.

edit: can you mount a 20" moto rim to a 24" bike rim? would you guys recommend this

 

[liveforphysics]

 

[DasDouble]

For a 24" bike rim, what tire would you guys recommend that's flat resistant with a dual sport tread for both street and offroad? basically the holy grail of 24" tires.

edit: can you mount a 20" moto rim to a 24" bike rim? would you guys recommend this

I want to know the same! My front tire is compleatly down and I have to look for a new tire. But there is no 24 x 3.0 tire on the marked.. :|
So now I have decided to have a look for enduro tires.. Or at least supermoto for as much as possible offroad use..!

 

[bzhwindtalker]

Any interest in eyletted 45mm wide double wall mtb rims specially made to 19" mx wheel size? 6061-T6 black anodised.
Trying to get them made, 200 pc min order

 

[DasDouble]

Any interest in eyletted 45mm wide double wall mtb rims specially made to 19" mx wheel size? 6061-T6 black anodised.
Trying to get them made, 200 pc min order

Will they fit on my Vector 24" x 3" rim? If so, then yes. Where to order? How much?

 

[DasDouble]

Alright, I can answer to my own question..

http://www.lmxbikes.com/en/spare-parts/32-halo-contra-24-x-3-tire.html

 

[RyanC]

Hey all, new here...had a question on this-

Did anyone ever try a MH90-21 for more road/commuting purposes? The 19" options look like they would put my bike too low to the ground. I have some solid tires on there now and 25.25"OD is already too low (can't pedal and turn).

I was looking at something like this-

https://www.amazon.com/Dunlop-American-Elite-Touring-Tire/dp/B00AC6T30U

It says 9lbs and it's 27" OD and 3.25 (from measurements this would fit). Looking for a more durable solution for the rear wheel of a radwagon (will upgrade motor/controller/batteries down the road). I was thinking that or something like it with a 21x1.6 rim like this-

https://www.jakewilson.com/p/3685/-/905534/Tusk-Impact-Rim-Front-36-Spoke-Hole-21-x-1.6-Black?v=11950&gclid=CJnqx5L_zc8CFQIEaQodVroDkg

I am way out of my depth here though. Thanks in advance-

 

[Rix]

Hey all, new here...had a question on this-

Did anyone ever try a MH90-21 for more road/commuting purposes? The 19" options look like they would put my bike too low to the ground. I have some solid tires on there now and 25.25"OD is already too low (can't pedal and turn).

I was looking at something like this-

https://www.amazon.com/Dunlop-American-Elite-Touring-Tire/dp/B00AC6T30U

It says 9lbs and it's 27" OD and 3.25 (from measurements this would fit). Looking for a more durable solution for the rear wheel of a radwagon (will upgrade motor/controller/batteries down the road). I was thinking that or something like it with a 21x1.6 rim like this-

https://www.jakewilson.com/p/3685/-/905534/Tusk-Impact-Rim-Front-36-Spoke-Hole-21-x-1.6-Black?v=11950&gclid=CJnqx5L_zc8CFQIEaQodVroDkg

I am way out of my depth here though. Thanks in advance-

There is a guy on this thread that was running 21x1.6 rims and dual purpose tires front and rear, problem is this thread is 69 pages long as of date and its back in the first 30 pages somewhere. I know at one point there was a pic posted of his bike.

 

[macribs]

Any interest in eyletted 45mm wide double wall mtb rims specially made to 19" mx wheel size? 6061-T6 black anodised.
Trying to get them made, 200 pc min order

Will there be much of a weight benefit? Say compared to a 19" x 1.85" or 19" x 2.15" alloy mx rim?

 

[bzhwindtalker]

I was trying to get weigth info for the 19"x 1.6" but I did not get it yet, anybody have info on that?
We are also trying to get some 19"x1.6" with custom drillings for regular MTB spokes

 

[macribs]

We are also trying to get some 19"x1.6" with custom drillings for regular MTB spokes

Now that sounds really good. It seems that the MMP rims are hard to get these days, or so I've read here iirc holmes hobbies was not gonna renew his stock of rims. He also had custom drillings with more angles, and used to carry custom washers.

If you are getting custom drillings for MTB spokes you might not need extra washers?

 

[DasDouble]

Could someone tell me the Advantage of 1.6 wheels? I mean why is it better tho have a less wider rim?

Thanks

 

[Merlin]

weight or problems with normal bicycle dropout "space".
a 2.0 " tire on a 19x1.85 is 2.25 " wide.
on a 19x1.6 ~2.0 wide
on a 19x1.4 ~1.9 wide.

but weight is the first point.
1.85 wide rims are easy 500g heavier.


if you search 19" rim for the front, every mx rim(kid bike) will do the job.
they are for the front and have a perdect angle for normal bicycle hubs.

the problem is using "normal" 19" mx rims on the back. this angle CAN be a problem with a 232mm Hub Motor.

if you go with 17" on the back, theres again no problem because they are for BACKwheels with large Hubs

for now iam doing normal 14g-13g spokes for the front with mx rim + "special" nipple spacer.
really great, fits nice, less weight. more flex.

 

[BCTECH]

got cracks on a couple of inner tubes at the valve area, does anyone have a good way to reinforce specially this area?

 

[bzhwindtalker]

Rim lock?

 

[Jimboyr6]

What inner tubes u using? try a better quality one.

 

[chucho]

got cracks on a couple of inner tubes at the valve area, does anyone have a good way to reinforce specially this area?

Dont screw all the way in the valve, leave a bit of space (about 3mm). That should solve the problem. If not you can use the rim lock.
The valve should have two nuts so you can screw one against the other to leave that space with out moving.

 

[atarijedi]

I bought a set of Warp 9 rims. 21x1.85" front and 18x2.15" rear, going for the trials bike look. I will weigh them when they show up in the mail, hopefully tomorrow, or at least this week.

 

[joe81]

got cracks on a couple of inner tubes at the valve area, does anyone have a good way to reinforce specially this area?

Dont screw all the way in the valve, leave a bit of space (about 3mm). That should solve the problem. If not you can use the rim lock.
The valve should have two nuts so you can screw one against the other to leave that space with out moving.

what is the meaning of this nut anyway?

 

[Rix]

got cracks on a couple of inner tubes at the valve area, does anyone have a good way to reinforce specially this area?

Only finger tigthen it. Also use 2 nuts, one on the inside finger tightened only. This is what I do, no issues

 

[BCTECH]

got cracks on a couple of inner tubes at the valve area, does anyone have a good way to reinforce specially this area?

Dont screw all the way in the valve, leave a bit of space (about 3mm). That should solve the problem. If not you can use the rim lock.
The valve should have two nuts so you can screw one against the other to leave that space with out moving.

what is the meaning of this nut anyway?

to sandwich the rim so that tube will not move and rip the valve

I thought they should be tight to keep the valve stays in position, I will try to loosing them to finger tight as many suggested see how it goes

 

[BCTECH]

What inner tubes u using? try a better quality one.

IRC, bikemaster, Kenda, ... easily pinched and valve ripped
bridgestone seems double the price but most people telling me no different on higher quality tube or HD
can try the UHD next step
I also heard increase the PSI will help but I really like the low psi too much.

 

[liveforphysics]

What inner tubes u using? try a better quality one.

IRC, bikemaster, Kenda, ... easily pinched and valve ripped
bridgestone seems double the price but most people telling me no different on higher quality tube or HD
can try the UHD next step
I also heard increase the PSI will help but I really like the low psi too much.

I went through similar. Gotta keep tire from rotating relative to rim. Some industrial rubber cement is lighter and easier to service than bead locks.