• Register now! It's free and easy.
  • Show your bike to the world, upload a photo today!
  • Hi Guest, did you know we have a dark style? It might be easier on the eyes at night time! Try it out here: Style Chooser

Grubee freewheel sprocket?

T

TWalker

Guest
More safe operation than with standard clamp to spoke sprocket attachment.
Freewheel sprocket hub allows easy pedaling with engine off.
Hub flange sprocket attach ensures true alignment and no broken spokes.
Drum brake included optional:

http://www.grubeeinc.com/USA/4%20stroke.htm


Anyone know how this works? Is it an actuall freewhell on both sides? Even for the motor drive?

Thanks
 


F

fetor56

Guest
I'de like to know more about this myself,anyone had practical experience with this?
bfef_1.jpg
 

fatboy67

Member
Joined
Mar 29, 2008
Messages
107
Correct me if I'm wrong , but That's only a freewheel at the sproket because the motor is a pull start. The cranks that are there are cranks that are made wider to go around the motor/ to have clearance around the motor I don't think those cranks are freewheel.
Again I might be wrong.
 

ducatiluke

New Member
Joined
Jan 8, 2008
Messages
22
yea it means when you pedal your not turning theleft hand chain and sprockets ,your clutch can be let out ,, it is also nice for coasting as no chains spin when going down hill
 
K

kerf

Guest
My Staton has a left hand freewheel on the engine drive. They are great and will spoil you rotten. With the centrifugal clutch, just back off the throttle and you're coasting. As for peddling, absolutely no drag, won't even know the engine's there.
 
D

Demosthenese

Guest
fetor that's the keyed non freewheel hub, isn't it? if so i have one. once you put the whole thing together the band brake is held on mostly by having nowhere to go, it attaches at the front to the bike with a bracket that is soft enough to form fit to your bikes tube. i have managed to get reasonable breaking power out of it, but i would compare it to the old caliper breaks at best, it has no skidding power at all. I now have a dual pull brake leaver setup on my bike that uses the front disk brake as well, between the two i feel safe.
 
F

fetor56

Guest
Demosthenese:
My idea is to use this Heavy Duty hub in conjunction with the 44T sprocket & method of mounting it.Later if wanted i could swap to other sprocket tooth sizes,it's the mounting system that i'm concerned with.You would need to redrill the sprocket to swap to commonly available HT sprockets but that's no big drama....6 hole to HT's 9 hole.
 
F

fetor56

Guest
I bought this to use with a dual-suspension mountain bike with a Titan rear kit.I'm not interested in the drum brake only the heavy duty sealed bearing hub with it's sprocket mounting system.
In order for it to work i had to tap out one of the bearings with a piece of wood & swap the axle around & use a single sprocket with freewheel.The derailleur also needs to be locked.
Today i'll order heavy duty spokes & later lace the wheel but i can't see why this won't work.....i'll keep ppl posted.
P1010057.JPG
PS...my intention is to use all this with a heavy duty,wide rim & Maxxis Hookworm 26X2.5 tyre.
 
J

japennell

Guest
Does anyone know where a Grubee freewheel sprocket can be purchased?

I am a very happy owner of a ThatsDax 48CC.

I am intrigued with the idea if this Grubee freewheel sprocket. However, I do not see how I can purchase one. Does anyone else know?

Thanks
 
F

fetor56

Guest
I've tried a 7 speed & 6 speed cassette on this rear hub & they don't fit.Hopefually this week i'll try a 5 speed & it will fit,rather than a single speed & locking the derailleur.
 
Top