What should I look for when buying a used host bike I have a 26" 1000W rear hub motor that I would like to use.  My original host bike needs a lot of work, so I decided to just buy a used bike instead.

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What should I look for for an ideal host bike?  This will be for mostly on road trips with the ability to carry a lot of cargo weight at long distances.  I will be building my own large battery out of 18650s.

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\-Suspension?

\-Aluminum or Steel frame?  I already have 2 high quality torque arms purchased.  Would an aluminum frame be adequate? I'd like to save on weight for better range.

\-disc brakes?

etc.

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Thanks for any input.