mixing two wheels... adding hubmotor to bassano grimeca
- Thread starter flez1966
- Start date
John in CR
100 TW
I've thought of trying that on many occasions, but lack the precision machining capacity. I'd machine off one of the spoke flanges on the motor and make that surface flat all the way to the other flange. Assuming the wheel is aluminum, i'd then cut the hub out and weld a ring to the 5 spokes with the ID the same as the OD of the motor, slide it on and bolt it to the remaining spoke flange. Getting perfect centering is the critical part, but definitely possible.
One thing to consider is that the Chinese don't go larger than 18" with their spokeless motor wheels. Why is that is a question I'd want answered first. Second, unless you have flat terrain where a large wheel is acceptable, it's always better to opt for the smallest wheel possible as far as motor performance is concerned.
I can't wait to see what you come up with.
John
One thing to consider is that the Chinese don't go larger than 18" with their spokeless motor wheels. Why is that is a question I'd want answered first. Second, unless you have flat terrain where a large wheel is acceptable, it's always better to opt for the smallest wheel possible as far as motor performance is concerned.
I can't wait to see what you come up with.
John
well i can say these 5 spoke wheels are doing better than any spoked wheel i have had, I'm a little on the heavy side and I was going through back wheels at a rate of 4-5 a year, each time they would buckle a bit and then over a few days just get worse and then spokes would fail......
I dont have this issue with fronts, but theres little weight at the front...
these 5 spokes ones are 'perfect' but a very very hard ride, and this is something that may be an issue if one was mounted to a motor
Also something else of a worry is the ability of the hub motors axle to take the strain of an heavy rider with it being a hollow axle, i have bent 2 normal axles last year....
I think i may need to upgrade / rebuild the hub motor as soon as it arrives before i even use it...
I was thinking of cutting out the centre of the 5 spoke wheel, and then sandwiching it between two hollow disks with profile cut to fit its wavy spokes, these disks would match the motor diameter diameter and then i could use 36 small bolts....
I dont know why they dont do spoked wheels that big with motors, like i have said these seem to be stronger than spoked.
I dont have this issue with fronts, but theres little weight at the front...
these 5 spokes ones are 'perfect' but a very very hard ride, and this is something that may be an issue if one was mounted to a motor
Also something else of a worry is the ability of the hub motors axle to take the strain of an heavy rider with it being a hollow axle, i have bent 2 normal axles last year....
I think i may need to upgrade / rebuild the hub motor as soon as it arrives before i even use it...
I was thinking of cutting out the centre of the 5 spoke wheel, and then sandwiching it between two hollow disks with profile cut to fit its wavy spokes, these disks would match the motor diameter diameter and then i could use 36 small bolts....
I dont know why they dont do spoked wheels that big with motors, like i have said these seem to be stronger than spoked.
dogman dan
1 PW
Sounds like what you really need is good rear suspension, and a better ability to tune a wheel. Soon as you are riding em bent, you are doomed.
Or a scooter with pedals, and nearly unbreakable wheels.
Best compromise, get a rear motor laced for a moped rim and tire.
Or a scooter with pedals, and nearly unbreakable wheels.
Best compromise, get a rear motor laced for a moped rim and tire.
oddly enough when a wheel goes i just put another on, i can collect about 2 a month from the dumpsite at the end of the road....
whats annoying is going out somewhere, to get a sideways knock on rough ground, and have the wheel deform a few mm, which over say 5 miles home turns into a banana...
I did recently have a go at building my own wheels up from bits of other ones, but only fronts so far, and they have been fine, I also think that the quality of wheels i get are in question, being from cycle that retail for like $70-$100 new in local supermarkets and while having different names all seem to have the exact same features and fittings from the same factory.
I guess what i need is thicker spokes, and its something i will look into, but if i can use these sporty good looking and uncommon wheels then i want to, i have already had the rear on for 6 months with no ill effects and its done fine, so i think if i can combine them, i'm on a winner...
Oh it also looks like i ordered a non disk front motor, and i did want to fit disks (2 infact, just for the looks...)
whats annoying is going out somewhere, to get a sideways knock on rough ground, and have the wheel deform a few mm, which over say 5 miles home turns into a banana...
I did recently have a go at building my own wheels up from bits of other ones, but only fronts so far, and they have been fine, I also think that the quality of wheels i get are in question, being from cycle that retail for like $70-$100 new in local supermarkets and while having different names all seem to have the exact same features and fittings from the same factory.
I guess what i need is thicker spokes, and its something i will look into, but if i can use these sporty good looking and uncommon wheels then i want to, i have already had the rear on for 6 months with no ill effects and its done fine, so i think if i can combine them, i'm on a winner...
Oh it also looks like i ordered a non disk front motor, and i did want to fit disks (2 infact, just for the looks...)
The fingers
1 TW
I had to go with a steel rim & heavier spokes due to the weight of the SLA pack on the rear rack, which solved the recurring spoke breaking.
motomech
10 MW
You should talk to Johnrobholmes, a master wheel builder, great guy and a member here.
Holmes Hobbies.
Concerning your proposed "Frankenwheel, I'm not a machinist, but worked in a machine shop for many years and that looks to be "tough one".
It's amazing what a good machinist can do and it probably could be done, but for what price $$$$$$?
Holmes Hobbies.
Concerning your proposed "Frankenwheel, I'm not a machinist, but worked in a machine shop for many years and that looks to be "tough one".
It's amazing what a good machinist can do and it probably could be done, but for what price $$$$$$?
Drunkskunk
100 GW
flez1966 said:
All those bikes are made in china, either part of Pacific Cycles (Schwinn, mongoose, ect..) or Huffy. Its possible they are all made in the same place. And the quality is questionable at best. The spokes used on most of those bikes are soft enough you can bend them like a paper clip. And the rims are so soft of an alloy, you have to wonder if they heat treat them at all.
Thicker spokes isn't the answer. What you need is good quality spokes (DTswiss, Phil Wood, ect.) 14 straight gauge is heavy enough for extreme offroad cycling. Thats actually thinner than what comes on most motors, but its many times stronger. and why go thinner? because its the thickest gauge most bike shops can handle. You also need a rim meant to handle weight. I'd suggest a nice DH style rim, like a Sun Ringle MTX 33.
yes they are all the made in china $100 specials at suermarkets etc
I will let this lie for a bit, I cant do nothing while the slow boat from china brings me my cheap hub motor and i can look at options, I may have none, dont know till i get it in my hand.
the news on spokes is interesting, i didnt know quality of such a simple item varied so much.
One issue is i ordered a front wheel by mistake, i dont like front power in wet weater it can cause it to break away so easily, I could just not worry about pedal power and fit it to the rear but then that breaks local laws (uk) but i suppose i could add a simple single speed freewheel held on by bolts that ''works'' for legal requirements
I will let this lie for a bit, I cant do nothing while the slow boat from china brings me my cheap hub motor and i can look at options, I may have none, dont know till i get it in my hand.
the news on spokes is interesting, i didnt know quality of such a simple item varied so much.
One issue is i ordered a front wheel by mistake, i dont like front power in wet weater it can cause it to break away so easily, I could just not worry about pedal power and fit it to the rear but then that breaks local laws (uk) but i suppose i could add a simple single speed freewheel held on by bolts that ''works'' for legal requirements
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