DH electric bike

[Joppo]

Im new at this forum so... Hi everyone.

I have a 500w hub motor on my bike from e-bikekit.com but I bend axle and changed the rim once, It's getting wery tired and I was thinking to change it. Do someone know if it is some "stronger" engines/hubs that can handle the beating from DH?

I ride a 48v lipo and the weight is important to. But most of all, it need to take more beating than my last kit. And PFC the price

 

[dogman dan]

If you are hucking air, then you likely need to leave hubmotors in the dust. Go to a chain drive of some kind. GNG kits are popular, but for REAL riding I would guess you need more power. Then you can go bend axles on regular hubs.

Start reading the non hub motor section for info. I'm just a hubmotor dope. I just backed off my riding so I wouldn't beat the hub to death. Fine for me, I'm old and lame. I just ride the rock staircases real slow. But I've still shaken the cover screws out of motors, and had a derailur disassemble itself on a ride.

Perhaps you could just get your current motor laced into a better rim meantime? Send it off to Holmes Hobby, JRH is the man. Or if you can lace, he can supply you the best spokes in the right length. All the hubmotors have fairly soft axles, but the bigger ones might be stronger. I would think a heavier more powerful hubmotor would just pound the wheel even more when hucking air. You need that weight centered on the bike for big flights and flat landings.

Or,,,,, you could just stop taking those jumps that give you a flat landing. Stick to slope landings, in 20 years your back will thank you. Wish I'd done that on skis back when I used to fly a lot. Those flat landings surely helped ruin my lumbar disks.

 

[Joppo]

The problem is that I can't use chain drive motor because of the link on this bike. The whole crank is moving when the shock moves.
I got a new DH rim but I think It got to stiff and bend the axle last trip.
What hub motor do those stealth bikes use? Aren't those DH bikes whit hub motor?
Maybe I can make a chain drive engine work, but don't like that ppl see the engine so easy

 

[Joppo]

Someone have a pinion about a good motor?

What do you guys think about the EM3ev with standard DH rim? 500/1000 w geared? Need to order this thing soon so I can bike again

 

[MadRhino]

Matter of budget, of course. If you can afford a big hub, it will do very good in the mountain but you will need some mods to the suspension to control the rebound of a heavy rear wheel. I believe you could have a cromotor quickly, and there are still some X54 available in europe, the H40 is in stock in the US... Many options to get your bike riding, including older X53 that can be found used for a good price.

 

[Drunkskunk]

The motor from ebikekits.com is a 9C, and has a 12mm hollow axle. they are strong enough for a mountain bike but not for DH. The motors Madrhino listed use a 14mm axle that will hold up better. The stealth bomber uses the 540X, but that motor weighs 3 times what your motor does, and wants big power.

Em3ev has good motors, but nothing stronger than what you have now.

 

[Joppo]

The motor from ebikekits.com is a 9C, and has a 12mm hollow axle. they are strong enough for a mountain bike but not for DH. The motors Madrhino listed use a 14mm axle that will hold up better. The stealth bomber uses the 540X, but that motor weighs 3 times what your motor does, and wants big power.

Em3ev has good motors, but nothing stronger than what you have now.

ok, good info. hwo makes the X54?

 

[dogman dan]

But will those bigger motors really have thicker or stronger axles? I get the distinct impression that he's hucking the thing to flat landings. You know, the little pile of dirt jumps that don't have a pile to land on.

9c's are pretty affordable. One a year not in the budget? If you get a rim that's strong enough, then a stator swap just takes a few min. Might work well to just keep using up cheap motors.

 

[Chalo]

But will those bigger motors really have thicker or stronger axles?

I'd just avoid motors that feed the leads through a hole in the axle. 14mm is better than 12mm, too. My old 5305 has a 14mm solid axle, but my even older Wilderness Electric BD36 has a 12mm hollow axle.

 

[Ypedal]

forget geared hub motors off-road... they will not last.

 

[Joppo]

Hmm, this doesn't sound good. Direct drive is heavy and geared don't last long. Someone tried that new crystalate The crow or something like that?

 

[MadRhino]

I would recommend the H40 over the Crown. Hyena and other Aus guys have had success with it, while the Crown is new and has no history yet. Any powerful motor will be at the expense of weight, that is good because it makes them better at shedding heat. Rear suspension custom tuning is not that expansive, and makes them big motors good for the mountain. My 33 Lbs X54 is a wonderful climber and rides real good in rough mountain trails, since the suspension had been custom tuned especially for it.

 

[dogman dan]

True enough, the wire out the axle might bend a lot easier. The HT cystalytes or other types with the wire out the side ought to be stronger. I was just looking at an old 5304 clyte's axle, and once you pass through the dropouts, it's really huge.

Still would like to know what he was doing the day the axle bent. It should handle small hops, even I do that.

 

[Joppo]

I would recommend the H40 over the Crown. Hyena and other Aus guys have had success with it, while the Crown is new and has no history yet. Any powerful motor will be at the expense of weight, that is good because it makes them better at shedding heat. Rear suspension custom tuning is not that expansive, and makes them big motors good for the mountain. My 33 Lbs X54 is a wonderful climber and rides real good in rough mountain trails, since the suspension had been custom tuned especially for it.

I'll look at the H40, you don't have a link where it cheap? I work repairing and tuning shocks, we are selling fox as well. Work with benefit :lol:

 

[Joppo]

Still would like to know what he was doing the day the axle bent. It should handle small hops, even I do that.

317m down, 204 heart rate, 68 km/h was my reading that day