Sprocket Adapter by Sportscarpat

Nice Work Pat !!

That's very nice.
Question, will the same 3-piece part fit multiple hub sizes, as long as the hubs are close in size?

how exactly do these work? i know it supposedly spins the wheel instead of the spokes, but i don't really see it grabbing onto anything. just the bolting areas running through the spokes(like the kit rag joints), which imo would be worse for the spokes since it's only 3 places to drive with instead of 9.

what am i missing here? never used one so my view is based solely on what i can see.

It looks like it will work quite well, and is strikingly similar in appearance to manic's adapter.
I like the fact that one does not need to bend the brake arm for clearance in your design.

the adapter looks great
I was thinking along those lines the other day ,the difference I was thinking was a disk hub mount as shown ,with the 3 properly spaced holes same as the sproket with 3 thick stand off tubes and bolts going through the sproket ,the standoffs ,and center hub disk ,with nuts on the bolts inside the spoke area
And wondering about different shims for different hubs,a machined center grove should hold them in place with a raised ridge around the shim

I'm glad this is finally here!
It's about time that we had a better option for rear sprockets & adapters.

Awesome now I finally wanna try one. I one want one!

How long is testing,or until they are available,and a guess at price??

(4) larger people,trailers ,trikes,and hilly country will need larger sprokets,I don't remember a tooth count(56/60 ?) large size,,I guess the standard kit (40 tooth ?)and the 36 are the next ones talked about the most(go too #2)

(2) there are many steel sprokets out there,so could there be an adapter plate to go on in place of the sproket ,to bolt a steel gear onto?........(maybe with a little wider main 3 piece hub and a really large adapter plate it could go a belt drive shieve)

****Do the insides of a 110 hub friction brake in the hub have "fine grooves"to increase the gripping power of the metal to metal brake shoes ?(kind of like the sipes on a tire,lots of gripping lines all the way around the inside, verses a flat hydroplane (slipping) type of surface of a wide bald tire?)

(1) Width ?if the other ones are gripping correctly from pirate and are only 3/4 inch then these should be ok for most ,or maybe a wider HD one also or bolt on blocks to widen it

(3) color is always nice as a drawing card( I mostly lean toward black and silver)

I've used a couple of the Creative Engineering adapters and sprockets and been very happy with their quality and performance. I've also admired Pat's work and have his first in frame gas tank for a Panther... awesome. Seeing options available to us, including the pineapple adapter, is a real good thing, in my opinion. This forum alone has over 28,000 members and many of us have multiple builds. That's a lot of motored bikes and the market is growing. I think there's room for everybody. Wishing you success, Pat, and continued success and innovation, Jim, at Creative Engineering.
SB

Regarding sprocket sizes, the EZMotors Qmatic transmission comes with a 56T sprocket and some of us use a bigger one yet for hill climbing capability... 64T. AZBill uses a 72T sprocket for hills while towing grand kids in a trailer. Don't forget the needs of the four strokers. Not everybody is running China girls or is going for top speed.
SB

sportscarpat said:

I fully expected this to have at least a little controversy attached to it, but after having many builds of my own held up because I could not aquire the necessary parts I just decided to make my own. It's not rocket science and I have seen the ones on ebay as well. Besides, the first thing I had to do with every adapter I ever bought was to modify it right out of the box. This version I designed truly is a simple bolt in with no modification necessary. It also just drops right into place with no spreading of spokes or fighting to just get it into place.
Pat

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Kudos to you on your UPDATED design! I think you have a winner here!
Truly a "plug and play" design.

(I was also going to add the words NEW and INNOVATIVE, BUT I am NOT here to stir the pot)

Questions please:
a. Roughly when will this be available?
b. Approximate retail price?
c. Is your adapters approximate CB-E110 hub acceptable tolerances the same as other adapters- 1.522" - 1.528"?

Thank you.

Awesome and 2 thumbs up!

to answer some of Pat's questions, here's my observations...

1. i've never had Jim's adapter slip or move on me, so i don't think width is a big factor.

one thing i would like, is more lateral adjustment. i've had a few builds where i have the adapter as close to the spokes as possible to get the clearance and alignment i need. it just needs longer sprocket prongs. not much longer, just a little.

2. i like steel sprockets. i've got some aluminum ones that look like sawblades after only a few months. with a high performance build, they really take a beating. since most sprockets are for smaller chains, a HD #41 chain and a motor with a lot of torque deforms the soft aluminum teeth.

3. annodizing's always a cool option. i was gonna get one of mine annodized, just never got around to it. if i coulda bought one already done, i woulda paid extra. but, not much extra, 'cause i know what annodizing costs (if i had a workshop or a big garage, i'd do it myself)

4.i don't think you need to make every size possible, but definitely more than just a couple. i ride 28's and 30's, and want one even smaller for flat out top speed, regardless of the low end sacrifice.

on most other bikes, the difference between a 40t and a 41t is about an inch of chain and 1mph, so every tooth count isn't really needed. i'd make common sizes, 30, 36, 40, 46, 52...

having the option to buy any tooth count would be nice, too, as long as the cost to make a one-off wasn't too crazy.

now here's some input from me...

for no other reason than to avoid controversy, i'd try to make it look a little less like Jim's. i know it's a basic design with not much room for aesthetics, but, y'know...

i'd make the sprocket bolt pattern universal. i dunno what Andy's, or some of the other makers are, but the ability to use a kit sprocket, or any other sprocket gives a lot more options. i have a 35t from, uh, i forget, that doesn't fit anything but a rag joint, even though it has 50 holes drilled in it. so it's useless to me.

with a universal pattern, not only could you tune your gearing easily, but in the event you slip a chain and mangle a sprocket (which i've done) you can still slap your kit sprocket on to keep you riding while you wait for a new one to ship.

with very few exceptions (mostly on older bikes) the sprockets are all standardized so they can be interchangeable and invites competition and variety.

i think that's about it...

Venice Motor Bikes said:

Hey Cowboy... For being someone who's only been here since Dec 2010, you sure know a lot about whats gone on here in the past!! (Things that have deleated for a very long time!!)
In re-reading all your posts, I'm guessing YOU ARE JIM!! because you form sentences just like him & use so many of the same phrases he has in the past like "biting the hand that feeds", & you certainly singled me out right away!!!

Hmmmmmm...... could it be??

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Hmmmmm gets popcorn !

hey pat could you delete some pms so i could send you a message?