MadRhino said:There are some hardtail MTBs that are made wide, usually through axle, they are designed for slopestyle or freestyle acrobatics. I have a Chameleon that is 148mm rr axle, and I have seen a Doberman that was 150mm. They are expansive, and not so easy to find on the used market. If you want wide and cheap, the fat bike market might be your only field of research. Alternatively, just spread the dropout width of a standard 135mm.
dogman dan said:You can spread a steel frame plenty.
Alu frame best not to spread much more than 5 mm more. More than 5 mm steel or alu, the dropout plates will start to not be parallel anymore. It will bolt up in a V shape, and the result will be the axle nuts don't stay tight anymore.
Steel frame, bend out the stays, then bend the dropouts back in, to parallel again.
MadRhino said:Alu grade and thickness is very different on various bike frames. Some of them you can cold shape, some of them you can heat and shape, some of them you can't do much with but welding. Heat treatment is complicated, making it difficult to restore alu grade properties after it's been re-worked. Best is to add custom dropout plates, bolted on existing material ideally, that will extend length and width at will to best fit your motor, wheel, brake, tire, to your bike frame. This requires to replicate existing brake and derailer mounts to the custom plates, and let you add other mounts that you may need (mud guard, rack, kick stand, trailer...). That is the way to make a perfect fit.
MadRhino said:Yep. The axle shoulder can be filed. It is common to cut the dropout width of a QS 205 to 146mm.
Custom dropout plates are not only making a wider seat for the axle, they are stretching the chain stay. Once the freewheel is behind the original dropout plates of the frame, the motor itself will fit in 135mm. Also, backing the motor a few inches, sometimes combined with a smaller diameter wheel, does make it possible to fit a 3 inch tire on frames that are not clearing it normally. Adding length to the wheelbase is also making the bike more stable, in acceleration especially.
MadRhino said:There are no standards other than IS or POST brake mounts, and derailer hanger. You have to make them custom for your frame and motor. It does look much harder than it is really. Once you started making them, half the challenge is done and the rest is only patience. Some do them in 3 hours, other spend the week, but all of them are riding after all...
ebike11 said:MadRhino said:There are no standards other than IS or POST brake mounts, and derailer hanger. You have to make them custom for your frame and motor. It does look much harder than it is really. Once you started making them, half the challenge is done and the rest is only patience. Some do them in 3 hours, other spend the week, but all of them are riding after all...
I dont have the resources here to make my own. I just thought there might be ones on the market for generic style mtb dropouts.
Maybe filing down the motor shoulder is what i might need to do
E-HP said:ebike11 said:MadRhino said:There are no standards other than IS or POST brake mounts, and derailer hanger. You have to make them custom for your frame and motor. It does look much harder than it is really. Once you started making them, half the challenge is done and the rest is only patience. Some do them in 3 hours, other spend the week, but all of them are riding after all...
I dont have the resources here to make my own. I just thought there might be ones on the market for generic style mtb dropouts.
Maybe filing down the motor shoulder is what i might need to do
Careful or you may create an issue with aligning your disc brakes or clearance between the disc and chainstay.
E-HP said:ebike11 said:MadRhino said:There are no standards other than IS or POST brake mounts, and derailer hanger. You have to make them custom for your frame and motor. It does look much harder than it is really. Once you started making them, half the challenge is done and the rest is only patience. Some do them in 3 hours, other spend the week, but all of them are riding after all...
I dont have the resources here to make my own. I just thought there might be ones on the market for generic style mtb dropouts.
Maybe filing down the motor shoulder is what i might need to do
Careful or you may create an issue with aligning your disc brakes or clearance between the disc and chainstay.