Deecanios first build the "DC1"
- Thread starter deecanio
- Start date
hi all
just phoned Chris Bell of highpath enginering, asked after 3 speed blocks he told me I was about 50 years too late, he has tried to come up with somthing like this himself before but with no luck and he is one of the best.
asked about welding sprockets onto a freewheel he said it was possable but would damage the heat treatment!
D my best bet for you might be to save up and by a mk2 Puma that will take a 7speed block on 135 dropouts the disk brake adaptor will work on the new puma I asked mark, the axel is m15 thread with 10mm flats so you would have to get the torque arms altered.
This would give you the gears you want with a spare motor that could be put into a second cycle.
if you got a set of metal gears as well then the cost will be the best part of £350 for the motor and gears you will use the rest of the gear from the setup you already have.
just phoned Chris Bell of highpath enginering, asked after 3 speed blocks he told me I was about 50 years too late, he has tried to come up with somthing like this himself before but with no luck and he is one of the best.
asked about welding sprockets onto a freewheel he said it was possable but would damage the heat treatment!
D my best bet for you might be to save up and by a mk2 Puma that will take a 7speed block on 135 dropouts the disk brake adaptor will work on the new puma I asked mark, the axel is m15 thread with 10mm flats so you would have to get the torque arms altered.
This would give you the gears you want with a spare motor that could be put into a second cycle.
if you got a set of metal gears as well then the cost will be the best part of £350 for the motor and gears you will use the rest of the gear from the setup you already have.
Hi Geoff,
thanks for asking - yes seems to be the case that we could 3 spd freewheel easily if w had a time machine!!!
i'm hoping that Sunrace may reply to myself or miles but i dont think they will
interesting on the mk2puma - it was my understanding that it wouldn't except a disk or any more than single speed cluster for 135mm drops?
do you have a clear picture of your mk2 to show?
i would easily have another puma even as just a spare for now - i could lace it into my 20's and have a spare set (im curious what a 50a puma would do in a 20
)
cheers and thanks for asking Geoff,
D
thanks for asking - yes seems to be the case that we could 3 spd freewheel easily if w had a time machine!!!
i'm hoping that Sunrace may reply to myself or miles but i dont think they will
interesting on the mk2puma - it was my understanding that it wouldn't except a disk or any more than single speed cluster for 135mm drops?
do you have a clear picture of your mk2 to show?
i would easily have another puma even as just a spare for now - i could lace it into my 20's and have a spare set (im curious what a 50a puma would do in a 20
)cheers and thanks for asking Geoff,
D
hi Ddeecanio said:Hi Geoff,
thanks for asking - yes seems to be the case that we could 3 spd freewheel easily if w had a time machine!!!
i'm hoping that Sunrace may reply to myself or miles but i dont think they will
interesting on the mk2puma - it was my understanding that it wouldn't except a disk or any more than single speed cluster for 135mm drops?
do you have a clear picture of your mk2 to show?
i would easily have another puma even as just a spare for now - i could lace it into my 20's and have a spare set (im curious what a 50a puma would do in a 20
cheers and thanks for asking Geoff,
D
my mk2 Puma has a 7 speed block on at the moment getting that fitted by my LBS is what caused the damage I got to the axel cable after a phone call a few weeks ago in which mark said he no longer did the disk adapter I phoned this afternoon and asked if somone had one of those adapters could it be used on the mk2 Puma he said it could.so you should be able to put a mk2 in your ebike with a disk like you had on your old motor and a 7 speed block the smallest sprocket I have so far is is a 14t .this will fit in 135mm dropouts with no problems.
mark may have a problem if you ask for a full kit to my knowledge he is having problems with getting new controllers but if you just ask for a motor and metal gears you should have no problems,I asked for that and was asked on the forum how come I had got my mk2 puma when this guy had been waiting longer than me !
hi D
ckeck out my thread see what you think.
http://endless-sphere.com/forums/viewtopic.php?f=6&t=4189&st=0&sk=t&sd=a&start=60#p73381
ckeck out my thread see what you think.
http://endless-sphere.com/forums/viewtopic.php?f=6&t=4189&st=0&sk=t&sd=a&start=60#p73381
Hi All,
long time no post here but updates are coming very soon
i have a few questions i'd like to throw out before i spend money on something that won't work.
I'm planning to have some gearing on my bike so that i can pedal through the whole range of speed the motor can produce (0-35mph).
i have been running single speed for the last two seasons, initially 17t rear with 32t front (gave me 0-10mph ish pedal ability) and then 17t rear with a 42t rear (gave me about 18/19 mph but difficult to start off).
the single sprocket up front was on the "middle" ring of the crank but what i want to do now is have a 32 on the "inside" 42 on the "middle" and a new custom 52t on the "outside" and i want to change the 17t to a 16t.
soooo, my ratio's are now 16t rear with 32/42/52 at the front - also my wheel diameter is now 24" instead of 20" does anyone have the nouse to tell me roughly what my pedal speeds will be?????
also because i will have 32/42/52 instead of 22/32/42 as normal on mtb will i be able to use the old front derailuer?
i guess it will work as its still shifting over the same height/width i'll just have to put it higher on the tube? but am i missing somethingobvious here???? sheldon brown where are you??? lol
and finally - i still have the shortened cranks on - i actually really like them as my legs dont have to move as much with the smaller circle ( i've had 4 cartlidge ops 2 on each knee) but what is the effect on gearing????
thanks all, love you guys
cheers
D
long time no post here but updates are coming very soon
i have a few questions i'd like to throw out before i spend money on something that won't work.
I'm planning to have some gearing on my bike so that i can pedal through the whole range of speed the motor can produce (0-35mph).
i have been running single speed for the last two seasons, initially 17t rear with 32t front (gave me 0-10mph ish pedal ability) and then 17t rear with a 42t rear (gave me about 18/19 mph but difficult to start off).
the single sprocket up front was on the "middle" ring of the crank but what i want to do now is have a 32 on the "inside" 42 on the "middle" and a new custom 52t on the "outside" and i want to change the 17t to a 16t.
soooo, my ratio's are now 16t rear with 32/42/52 at the front - also my wheel diameter is now 24" instead of 20" does anyone have the nouse to tell me roughly what my pedal speeds will be?????
also because i will have 32/42/52 instead of 22/32/42 as normal on mtb will i be able to use the old front derailuer?
i guess it will work as its still shifting over the same height/width i'll just have to put it higher on the tube? but am i missing somethingobvious here???? sheldon brown where are you??? lol
and finally - i still have the shortened cranks on - i actually really like them as my legs dont have to move as much with the smaller circle ( i've had 4 cartlidge ops 2 on each knee) but what is the effect on gearing????
thanks all, love you guys
cheers
D
hey Miles,
thanks, i have seen this before but i dont understand it very well due to a lack of grey matter through abuse
anyway heres the results for 24" nominal? meh,
Gear chart using Gain Ratios
For 24 inch (nominal) tire with 160 mm cranks
With Custom Sizes Cassette
32 31.3 % 42 23.8 % 52
16 3.8 5.0 6.2
This small version of the chart can be printed, cut out, and taped to your bicycle for reference.
3.8 5.0 6.2
Note: This is under construction, and the print function does not yet work.
Gear Chart by Sheldon Brown
http://sheldonbrown.com/gears
i dont get how to use it properly?
what i want to know is what mph each ring will give me ? i know it depends on my cadence (think thats the right word) but as a rough estimate?
also i dont get the gear ratio's - is 32-16 is a straight 2:1 ratio ? what do these figures from sheldons calc mean?
sorry to be thick
i tried to get mph - looks like you need to put pedal rpm in but at 16/52 with 120 rpm
it still sais only 27mph? does that sound right to you miles?
Cheers
D
thanks, i have seen this before but i dont understand it very well due to a lack of grey matter through abuse
anyway heres the results for 24" nominal? meh,
Gear chart using Gain Ratios
For 24 inch (nominal) tire with 160 mm cranks
With Custom Sizes Cassette
32 31.3 % 42 23.8 % 52
16 3.8 5.0 6.2
This small version of the chart can be printed, cut out, and taped to your bicycle for reference.
3.8 5.0 6.2
Note: This is under construction, and the print function does not yet work.
Gear Chart by Sheldon Brown
http://sheldonbrown.com/gears
i dont get how to use it properly?
what i want to know is what mph each ring will give me ? i know it depends on my cadence (think thats the right word) but as a rough estimate?
also i dont get the gear ratio's - is 32-16 is a straight 2:1 ratio ? what do these figures from sheldons calc mean?
sorry to be thick
i tried to get mph - looks like you need to put pedal rpm in but at 16/52 with 120 rpm
it still sais only 27mph? does that sound right to you miles?Cheers
D
ok i will do when i get home, they are chunky tyres too so maybe i might get the magic 30mph im after.
tbh if i actually get 27mph that will be absolutely fine as i rarely get over 25 on the trails. what so you think about getting away with using the old front derailuer? will it work? i think 16t is the smallest rear i can get??? what im trying to avoid is spending money on a front setup only to have a rear cluster on a standard wheel when i go rc motor - maybe i should just stick to 42/16 till i change.mmmmmm.
thanks for the help.
cheers,
D
tbh if i actually get 27mph that will be absolutely fine as i rarely get over 25 on the trails. what so you think about getting away with using the old front derailuer? will it work? i think 16t is the smallest rear i can get???
what im trying to avoid is spending money on a front setup only to have a rear cluster on a standard wheel when i go rc motor - maybe i should just stick to 42/16 till i change.mmmmmm.thanks for the help.
cheers,
D
Hi Mate,
Single freewheel at the mo but i thought that 16 was the smallest?
if i can get a 14 that would be way cool as i haven't bought one for the new puma yet - i found 14t before but they were for a "flip flop" hub whatever the hell that is? do you know where i can a 14t freewheel that will just screw on? i think mine are just like bmx with the same thread?
Cheers,
D
Single freewheel at the mo but i thought that 16 was the smallest?
if i can get a 14 that would be way cool as i haven't bought one for the new puma yet - i found 14t before but they were for a "flip flop" hub whatever the hell that is? do you know where i can a 14t freewheel that will just screw on? i think mine are just like bmx with the same thread?
Cheers,
D
Hi D,
Some of the BMX hubs (the flip-flop, ususally on one side) have a smaller dia mounting thread and can take smaller freewheels. The smallest freewheel for normal thread is the 15t AC Racing.
http://harriscyclery.net/itemlist.cfm?category=116&catalogId=39
Some of the BMX hubs (the flip-flop, ususally on one side) have a smaller dia mounting thread and can take smaller freewheels. The smallest freewheel for normal thread is the 15t AC Racing.
http://harriscyclery.net/itemlist.cfm?category=116&catalogId=39
lovely jubbly mate
i'll be ordering one of those baby's later on tonight, thanks for the link - its a real shame those suntour 3 speed rears turned out to be unavailable
but one of these will do nicely - back to the calculator to see if that makes 30mph pedal ability
cheers miles.
D
i'll be ordering one of those baby's later on tonight, thanks for the link - its a real shame those suntour 3 speed rears turned out to be unavailable
but one of these will do nicely - back to the calculator to see if that makes 30mph pedal ability
cheers miles.
D
Hi D
with the first kmx I wanted to keep up with it so I altered gears so I could. I have a cyling uncle he alway refers to gears in "gear inches" this means the diameter of wheel a penny farthing would be to get that gear, the other way is called development which is the distance you would travel in one revolution of the cranks.
next speed has to be factored in to this, for this post I will consentrate on th top speed you said of 35 mph with a 24" wheel, now lets say you keep the 52t front chainring you have the new puma I belive this will take a 7 speed block I had a look at mine its smallest sprocket is 14t.
I have all this in a spread sheet I have put in the figures and these are the results:-
top gear inch =92 development = 7.35m
below is a table showing the relationship between speed and cadence or rpm of the pedals
I am used to a lower cadence than on an upright bike for me 60 is my norm, 80 to 90 would be yours I would think this still falls a long way short of 125 you would look like road runner.
If you take the route of changing gears to be able to pedal fast enough then you would have to go up to a 72t chainring and then you would only hit 35 at 90 cadence.
with the first kmx I wanted to keep up with it so I altered gears so I could. I have a cyling uncle he alway refers to gears in "gear inches" this means the diameter of wheel a penny farthing would be to get that gear, the other way is called development which is the distance you would travel in one revolution of the cranks.
next speed has to be factored in to this, for this post I will consentrate on th top speed you said of 35 mph with a 24" wheel, now lets say you keep the 52t front chainring you have the new puma I belive this will take a 7 speed block I had a look at mine its smallest sprocket is 14t.
I have all this in a spread sheet I have put in the figures and these are the results:-
top gear inch =92 development = 7.35m
below is a table showing the relationship between speed and cadence or rpm of the pedals
I am used to a lower cadence than on an upright bike for me 60 is my norm, 80 to 90 would be yours I would think this still falls a long way short of 125 you would look like road runner.
If you take the route of changing gears to be able to pedal fast enough then you would have to go up to a 72t chainring and then you would only hit 35 at 90 cadence.
hi Geoff,
thank you for the table that really helped me understand how it works
well, i have decided to buy the 15t freewheel that miles found for me, thanks miles.
I'm amazed that i would need 72t at 90 cadence to achieve 35mph, that would make my chainring almost bigger than the crank arm!!
i think with 15/52 i will be ok, close enough to 30 is good enough.
the problem i have with having a cluster (giving me as low as 11t) is two fold - firstly i dont want a dished wheel, which with my puma means no cluster, secondly even if i had the cluster although it would give me a wider range of gearing i think that it would be wasted - lets say i had a 7 speed for example, how many of those gears would i actually be able to select in the short timeframe that it takes the puma to hit top speed? 1? 2 maybe?
i think 3 speed is the perfect answer for me - which can all be done at the front as luck would have it.
i'm hoping that 1st 2nd 3rd will be selectable whilst i wind the puma up to top speed enabling me to pedal right through the acceleration up to 30mph, after that i only have another 5mph which the motor should do by itself no prob as it will be up to speed?
As long as i have the pedal range 0-30 i'll be totally happy, it will be enable me to assist up any hill and at any speed which is what i'm after - oh that prompts another question, because my hub and drivetrain are completely seperate does that mean that i will be able to go up/down the gears regardless of motor speed also?
Does anyone want to have a stab at the question about the original front deraileur? i think it will work but we will see
thanks for the help guys,
D
thank you for the table that really helped me understand how it works
well, i have decided to buy the 15t freewheel that miles found for me, thanks miles.
I'm amazed that i would need 72t at 90 cadence to achieve 35mph, that would make my chainring almost bigger than the crank arm!!
i think with 15/52 i will be ok, close enough to 30 is good enough.
the problem i have with having a cluster (giving me as low as 11t) is two fold - firstly i dont want a dished wheel, which with my puma means no cluster, secondly even if i had the cluster although it would give me a wider range of gearing i think that it would be wasted - lets say i had a 7 speed for example, how many of those gears would i actually be able to select in the short timeframe that it takes the puma to hit top speed? 1? 2 maybe?
i think 3 speed is the perfect answer for me - which can all be done at the front as luck would have it.
i'm hoping that 1st 2nd 3rd will be selectable whilst i wind the puma up to top speed enabling me to pedal right through the acceleration up to 30mph, after that i only have another 5mph which the motor should do by itself no prob as it will be up to speed?
As long as i have the pedal range 0-30 i'll be totally happy, it will be enable me to assist up any hill and at any speed which is what i'm after - oh that prompts another question, because my hub and drivetrain are completely seperate does that mean that i will be able to go up/down the gears regardless of motor speed also?
Does anyone want to have a stab at the question about the original front deraileur? i think it will work but we will see
thanks for the help guys,
D
http://harriscyclery.net/cart.cfm
thats what i read when i add to cart and try to check out
nice one miles, well if no one else wants one i'll get 2??? :lol:
maybe three and postage comes to over 100$??? i mailed them to see if they would send one only so we'll see what they say - whats your one for???
Cheers,
D
thats what i read when i add to cart and try to check out
nice one miles, well if no one else wants one i'll get 2??? :lol:
maybe three and postage comes to over 100$??? i mailed them to see if they would send one only so we'll see what they say - whats your one for???
Cheers,
D
Similar threads
