Wheel

Tommy Griffin

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I am buying a new wheel for the rear of my motorbike because I have major problems out of coaster brakes. I want to know what I will need to do in order to attack a sprocket to the six holes on the wheel . I am attaching it to a beach cruiser so I'm putting a one gear freewheel on it .
 
Hey, charge your phone! Only 15% charge left :eek:. Umm, in all seriousness, Tom and I were over at Lynn's place and I think we talked about this exact thing but unfortunately I have goldfish memory. Send a message to Tom from Rubicon and maybe he can recall exactly what Lynn said about it or can review more insights.
 
google for a sprocket drilled for both 9 hole and 6 hole disc mounts
 
google for a sprocket drilled for both 9 hole and 6 hole disc mounts

yes, but he also might need a spacer, which is what Tom and I discussed with Lynn (owner of custommotoredbicycles). i just don't remember the exact specifics of what she said might needs to be done.
 
It looks like a single wall rim , double wall is the ticket for rear wheel.
 
The disc brake rotor is quite far out from centre (and spokes) so that the caliper can fit in there and not get hit by the spokes. If you attach a sprocket directly to the six ISO disc mount holes it would be too far out from the centre line of the bike to match up with your front sprocket.
The sprocket is likely to be larger diameter than the disc that the frame was intended for anyway (160mm rear is usual) so it would be impossible to fit inside the chainstay (maybe on a fatbike with more parallel chainstays).

The Kings top hat adapter has two sets of holes so that the sprocket is mounted inside the adapter, 1/8"-1/4" further in towards the centre line. However, when i was looking into this myself I found that it is made with the weird nine hole pattern so you can only use the kit sprocket and the limited choice of (tooth count) sprockets sold by the same company that makes the adapter. It makes commercial sense I guess, but mechanically and for the greater good of the hobby and PEOPLE WHO AREN'T IN THE USA, I really wish they would make them with any of the common standard bicycle chainring bolt patterns. Perhaps they could have both the 9-hole and also a five bolt 74mm or four bolt 104mm standard pattern... Hi there. ;)
 
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Just went and measured the bolt circle of the wheel Tommy Griffin is interested in. The bolt circle is 44mm.
When bakaneko and I visited Lynn. she showed us a prototype adaptor plate with a hole pattern that mounted to that hub which was for attaching a brake disc. The drive sprocket could be mounted to either side of the adaptor plate if needed to optimize chain alignment. That said, I have no idea when Lynn will have any made. Consequently I am going to make my own in the near future. I have a 6mm thk. steel disc turned and bored which I will center up in the Bridgeport. Then drill the hub 6 hole pattern and the 3 hole pattern for my drive sprocket.
Lynn's adapter, when made will be of 7075 T6 aluminum.
Tom from Rubicon
 
Lynn has all sorts of shim rings to adjust sprocket position. I don't know if you have given thought mounting the drive sprocket inboard on the adapter ring. All I know is I have re-bored 50+ steel drive sprockets to I think 54mm ID.
To be used with her "system" as she calls it. Lynn's adapter has as I recall four bolt circle patterns.
The adapter I plan on making is to mount the 56 tooth drive sprocket recommended for use with EZ=matic transmission.
I can Email Lynn to let her know Tommy Griffin wants one of her "systems".
 
Lynn has all sorts of shim rings to adjust sprocket position. I don't know if you have given thought mounting the drive sprocket inboard on the adapter ring. All I know is I have re-bored 50+ steel drive sprockets to I think 54mm ID.
To be used with her "system" as she calls it. Lynn's adapter has as I recall four bolt circle patterns.
The adapter I plan on making is to mount the 56 tooth drive sprocket recommended for use with EZ=matic transmission.
I can Email Lynn to let her know Tommy Griffin wants one of her "systems".

Yes, inboard on a flat plate wouldn't do it, that's why the Kings top hat is a top hat shape, gives you 1/8"-1/4" more "inboardness" (two versions available).
If this new top hat adapter has the bolt pattern for the four bolt mountainbike chainrings that would be a great improvement over the original and I'm all for it. :)
 
I just seen that a guy destroyed one of these from the torque on his bike so I dropped it . I'm getting a chrome single speed freewheel and then I gonna use caliper brakes and a hub adapter .
 
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