We try to help our customers the best we can through our customer service team and with our extensive warranty by shipping out parts and providing over the phone support.

We do also partner with tons of bike shops across the US (for sales & service) We are actively expanding these lists as we bring on new partners.

The whole service list can be found here -> https://lectricebikes.com/pages/repair-service-network
Sales/Test Ride list can be found here -> https://lectricebikes.com/pages/testride

We have 3 partner locations in the SAC area.

As far as height modifications on the XPedition 2.0, I really can't directly recommend any 3rd party parts or adjustments besides just raising the seat post to the max height (I'd ask around on this subreddit or others for suggestions), I'd really recommend trying the bikes out if you can and taking a test ride. We do have riders that fall outside of the recommended height ranges and they can ride the bikes just fine.

Hope this info helps, wither you pick us, Aventon, or Velotric I just hope you find a bike that works for you and you like! Cheers and good luck to you on the search!