ive had this damn electric bike for almost a month now....

ive went thru 3 differnet controllers...and finnally get a controller that looks like it will work good...and I try to take the bike out today because it was 71 degrees here...and i get 2 blowouts on my back tube....

these are brand new tires and tubes...and I blew out 2 tubes at the exact same distance...

does this mean I am to heavy for back tube tire ? I weigh 260 and the bike weighs 70...so thats 330 lbs....the tubes just made a loud popping sound after about 5miles of travel each...

they are suppose to have 50-70 psi...and I had about 68 psi in them...

WTF is going on with my luck...this is ridiculous...I just want to ride the f##$@$ ing bike...

Did you check the tyre to find whatever it was that caused the first flat? If there's something sharp penetrating through the outer tyre, changing tubes is not going to help.

this is not a puncture problem..this was 2 blowouts..that happened at about 5 miles of distance travelled for each new tube....

I even used 2 seperate new tires..and it still happened..

i told my bike shop about this, and they said they never heard of this happening..
i feel so special..LOL..

when I took both tubes out...they are actuall ripped apart in the center about 6 inchs long...

Unless you pumped your tires to 200 psi what's happened is something has punctured the tube (or you pinched the tube with your tire iron when you installed the tire).
Rub your hand along the inside of your tire. There is most likely a small sliver of metal, glass, etc. hanging out and giving you the trouble.

Ive decided that im gonna go with airless solid tire on the back rim, just like I have on front rim ....

my big problem is this,....the front rim is the stock rim..and it has a inner bead lip width of 18.3 m.m . this works for the solid tires { 18 -20 m,.m is needed** the rear rim is the hong kong rim with hub motor installed...it has 25 m.m. I.D bead width....this will not hold the solid tire secure. I will have to find some way to press the rim inwards a total of about 5 -6 m.m so its inside bead lip will grab the solid tire adequately....I have the tire installed on the rim right now...im thinking I may be able to take it to a machine shop and let them use a hydraulic press that can accurately measure 6 m.m of compression on the rim { 3 m.m for each side] so the inside bead lip grabs the bead of the solid tire.

I found the tire for you!

Your solid tire solution sounds like over-kill to me. I'm guessing that your blowouts were caused either by a faulty rim tape install or by tubes that were too small for your tires. A ballon will burst if it is over expanded.

I used to get blowouts all the time until I took the trouble to address those very same issues on my cargo bike; since then I have not had a single flat, though I have worn out many sets of tires.

Anyway I hope you get the problem solved and finally get to enjoy your electric.

how much is shipping costs ?
LOL..

Your problem is this..

CRAP tubes.

I used to buy tubes from target. BAD idea.
I bought 3 so I would have extras... So I had a flat and replaced it with the first tube.. It blewout WHILE pumping it up with a hand pump (only got to 30psi then blam!). So what did I do? Took out the second one, checked my rim and bead, no problems there, started pumping up the second tube and AGAIN! BLAM! (around the same psi). So took the third one, put it in and it inflated correctly!! Yey! UNTIL... 100' from my house and another blowout.
Never bought from target again, and haven't had any problems since.
Moral of the story....
If at least 2 of the same item have a problem, most of the items from the same company are probably bad too.
So, has your bike been ok since?

P.S. I bought a "thick" tube that also was filled with slime and have been riding on that same tube for over 2 years with no problems since!

I believe the machine shop is going to have to build a custom jig to do that which will cost a good bit.
Go to the bike shop and have them show you how to properly install tape, tube, and tire.
Or failing that, have them lace you a new rim that will fit your solid tire. I think it will be a better outcome than mashing your rims in a vice.

yeah...gonna buy a 700 c - 36 spoke rim that has a 18-20 m.m I.D. bead width and then mount my rear solid tire and rear hub motor to that.

im to damn unlucky to have air tubed tires. Im looking forward to having all these problems stop and I can maybe get to rid 20 miles on 1 trip with this ebike.

maybe next, when i get the controllers fixed , the tires fixed, I can count on one of the magnets/ hall sensors fallin off my brushless hub motor. ROFL.

im just going all solid tires....maybe I will have this ebike ready to drive by April.

what brand controllers, what brand bike?
MC

the bike is made by Giant...it is a hybrid 21" frame...cost about $400 new, I got it for $200 and its only about 6 months old..

the ebike kit came off ebay from hong kong...looks like the stock controller was made by Cohnis , but the ebay seller told me that the brushless hub motor is a 1000 watt direct drive Bafang ....but maybe hes lieing..LOL...

the 2nd controller I got off a friend on this forum , but it isnt made to work with my bike,. so he told me to send it back and he will refund my money which I am gonna do this week...

thw two tubes that blew out on me , at about 5 miles of distance travelled each, were brand new, but I dont know where they were made...the guy I bought the bike from gave them to me.

either way, I hope I now got the controller issue fixed { had to buy a $129 controller that has modified electronics/mosfets ** and I just bought a bike rim off ebay that is 700 c / 36 spoke...when that arrives I will lace my hub motor onto this new bike rim , which has a
20 mm I,.D bead width, which will then allow me to mount my amerityre solid ribber tire on it.
THEN...I wont ever have to worry about tube blowouts, flats or carrying air pump, tools ,etc...

Now that I will have 2 solid tires on the bike, { instead of just one upfront ** I assume the ride will be a bit harsher and I will lose 2-3 mph off my top end speed...BUT...I should not have to worry about tire problems ever again.

Im glad I bought this ebike kit in jan 2011...because it looks like its gonna take me 2 months to get the damn thing setup so it is reliable.

The added vibrations WILL reak havoc on your motor..
Hope it lasts you a year.

A YEAR???

heck..at this point in time ID be happy to get 4 months without a problem. A year would be over optimistic :**

when you say blowout, do you mean you blew the tube squeezed out between the rim and tire? This can happen if the tire isn't seated properly all the way around, or if the tube gets under the bead. I usually go around the tire and check to see if the tube is really inside the tire, then I partially inflate it. This tells if the tire is sitting right on the rim. Once I'm sure everything is correct, I pump the tire to final pressure. It's a little annoying the first time, but worth it.\\

When I was a bike mechanic, our cheap tires had really loose beads. Getting them on the first time without a blowout required a lot of care. I've also noticed this with 26" tires.

no, the tiube was still inside the tire....but both tubes blew out at about 5 miles of travel each...each tube started to make a odd noise a few seconds before they blewout...and each tube had a 8 inch split down the middle of the tube, where it had blown out.

the bike weighs 70lbs and I weigh 260lbs...so 330lbs is a fair amount of weight...maybe both tubes were cheap...but either way, im going to all solid tires....then I wont have to worry about blowouts , checking air pressure, carrying a air pump, tools, etc...

I had something that sounds similar happen to me last summer...
I've riding my old GT AllTerra with stock alloy rims for YEARS and YEARS. Converted the bike to a front direct drive. rear rim remained the same stock rim. I put Hemisphere EX slicks on it two summers ago.

Last summer I was riding as usual and the rear started thumping. And the tube blew a couple seconds later. I pulled the wheel, and tire and checked the rim, tire and tube. Tube had blown in about a four inch line.

I didn't notice anything on the rim or tire at the time so I put a new tube in, remounted an was on my way. Five minutes later there was another weird thumping. I stopped and looked before it blew and didn't notice anything and finished riding to work.

Next day I went out again and the thumping started immediately and the tire blew seconds later. This time I checked and noticed that the wire bead in the tire had worn through the inside of the tire and was exposed facing the inner tube. The inner tube was being pinched by wire bead with every rotation until the tube gave out.

Hey Sunnyday,

I found a good tire for us guys in the 260 club . I installed kevlar reenforced, "Big Apples" balloon suspension tires on my early Marin mountain bike. They soak up the ripples in the road nicely making my mountain bike more of a bomber bike where I can plow through the rougher roads at higher speeds . They should be good at resisting thorns, etc too. There are other tires too that are supposed to be good like "hook worms", etc. Just look around.

Hang in there Sunnyday! Good weather is coming.

I weigh 200 lbs and my bike with batteries etc. weigh 70 lbs. and I've only had one flat in three years on my commuter bike that racks-up over 2,000 kms per year.

Don't purchase solid tires, nobody likes them for obvious reasons, just purchace good quality "shawalbe" (sp) tires about 1.75" or more inches dia. with good tubes and you will be comfortable and flat free. Get tires that are Kevlar or puncture resistant type. pay more now and save in the long run, including your sanity. Good luck

i already purchased the solid tires weeks ago.

as far as your claim that " nobody likes them" { solid tires** this simply is not true. You can go to utube and see people who have them and like them. The solid tire technology of today is much different then that of decades ago. Of course the physics of a solid tire compared to a air tire will almost always mean a difference in riding charateristics , but I wont be riding 100s of miles each week , so the slightly rougher ride of a solid tire is acceptable because of the hassle free and safer performance they provide me. No worries about proper air pressure, or needing to carry a air pump, tools for changing blownout tires , tubes , etc. Some people are reporting 6000 - 10,000 miles on these solid tires before needing to change them.

They offer alot of advantages , with only one major disadvantage...slightly rougher ride.

its a no brainer for me. I ride on flat road surfaces anyways, so a slightly rougher ride is no big deal to me.

Ive read about the kevlar , and some people report that it works well, but after a few years, the kevlar starts to break down / fall apart.

let us know if this happens to you in the future ?

I'll let you know if I have any problems. I've only had them 2 months but, so far so good.