morsmana

Yeah, drop from 6 to 1 or 2. Yes the speed went all over the place - I think because the crank is hardly moving when you approach stall it can't actually measure anything properly - it only happens when I hit a hill and don't have enough speed or I'm in the wrong gear - exactly like a stall

Holy Hand grenade batman! I used to experience exactly this issue - it only happens when the motor is stalling - calling for too much current at a low speed, so going up hill with a high speed setting. Drop the power down to 1 or 2 as needed.

Do you still have the 302 led available?

Does anyone have any idea how the EMate MTB compares to my front wheel drive Oxygen kit in terms of torque? I'm on 700s on a ridgeback hybrid.

It would be great to have an upto date set of spec sheets for the main motors on offer. Mostly we get volts/ range/ max speed etc, but I can't remember torque being quoted often and for me that's one of the most important things to know as it describes the ability to accelerate.

Hi Steven, welcome to the forum! I converted a ridgeback velocity hybrid with a Oxydrive front motor and rear carrier battery. I'm 110kg and reasonably fit, live in the high hills of Cumbria and the bike is great. I am now getting rides in of over 30miles with typical climbs of 1500 + ft, averaging over 18mph. Some of the hills are v steep, which in the past have only been walked up, but now I ride up, albeit with a good deal of effort. But the kit gets me out, and over the hills - getting fitter all the time.

Andrew at Oxydrive has them on offer right now. I've converted two Ridgeback hybrid bikes so far this year using the Oxydrive kits, both are great. I live in Cumbria v hilly, house at 1400 ft and I regularly ride 20+ miles climbing well over 2000 ft typically, using half of the battery. I'm 110kg as well. Love them and Andrew at Oxydrive gives good support as well

Ps tyres do a brilliant job of absorbing any out of balance force!

1 if you are concerned with 'losses' friction is the number one by far. Pure wasted energy dissipated as heat. Your 'sticky bearings' will be like having a brake applied continuously. Could be wrong viscosity grease, too much of the wrong sort, misaligned when installed etc. This has to be fixed first. 2. A bike wheel can be considered to be a single disk. Car wheels are treated as two of more disks because of their width. The out of balance force is the out of balance mass times its radius times the square of the rotational speed. This is why you must balance statically first, then dynamically, and why the effect of out of balance is so speed sensitive. Your force at 30 is 25% of the force at 60. Look at a bike wheel - all the mass is at the outer edge. You could add a tiny mass to balance it first, but dynamic balance will be due to variation in tyre mass distribution. If you're that serious you could rotate the tyre to reduce the effect.....life and get one comes to mind!!

It amazes me that after all this time we are still talking about this fundamental element of all pedelecs. Most of us mere mortals will convert one or a very few bikes, but look at all the traffic there is on the problems of fitting the magnets to the crank gears side ( the easy fit split system supplied with the oxy kit for example is designed to fit the right hand side) or bodging the sensor to fit the non crank left hand side, because there's not enough clearence on the right hand side. Of all the plug/ sockets on the kit, if this one alone was reversible by 180 the problem goes away, no cutting wires, no bodging the sensor mounting, no gluing magnet rings on crank gears, replacing bottom brackets etc etc..

Are you positive the outside edge of the motor isn't fouling the inside of the fork - it did on mine and I got a very similar effect. Also is the orientation of the lock washer correct - the tab on mine was like yours is, and on checking the install notes it needed to be at the base of the cut out at the base of the forks. I ended up using a small diameter washer to push the forks out a couple of mm to give me the clearance I needed.

First real ride on my Oxydrive conversion (herladyship will be on hers this weekend I hope). This is what an ebike does for me: 13.8 miles in 1.30hrs, total elevation climbed - over 1500ft in the Cumbrian hills around Alston. Think I've sussed out the problem I experienced with very low speed cut out on v steep hills (speed would appear to vary instantaneously between 0 and 50 with corresponding motor on off) - if I reduce the assist to level 1 then it's ok. Could it be a current limiter of some sort kicking in? Anyhow I'm 110kg and I've never ridden like this before - a good workout yes, but never out of breath or high heart rate and felt I could have carried on for ever! Battery use very close to that predicted on Trip Simulator now giving me real confidence to go further...

Hi Andrew. Process of elimination, I think it's the comms cable from the display to,the controller. Tried all the other combinations between the two bikes!

Yes all pushed home. Same error with the motor connected or not. Also connected motor from other conversion with same result. Starting to suspect controller, but will swap them over when I have a chance in a couple of days. Have mailed Andrew at Oxy asking him to,look at the thread. . Ps bought those SKS mudguards you recommended, looking gooood!

Found the link - checked settings per Andrew reply and still getting the maint 09.