DIY on replacing the crankset on your Jetson Bolt Pro to reach 21MPH.
It involves replacing the stock 38T chainring with 53T! While I was able to hit 21MPH, I would not recommend it for general use. It was more difficult to pedal, and it felt like the pedal assist was not kicking in. I'd suggest around 45T for a better balance.

Jetson Bolt Pro Folding Electric Bike (PRICES SUBJECT TO CHANGE)
Jetson Refurb $249.99 https://ridejetson.com/products/bolt...
Costco $359 https://www.costco.com/jetsonboltpr...
Amazon $460 https://amzn.to/3ABCkYb
Amazon (non Pro version) $399 https://amzn.to/3voJ3TK
Ancheer 500W model $550 : https://amzn.to/3w3cYDf
DYU Website: https://shrsl.com/4b1qh

Crankset: https://amzn.to/3KZdary Should include 53T. They sent me 43T.
53T chainring: https://amzn.to/3wdYa5b
Bike tool kit: https://amzn.to/3zTnqBS
bike chain breaker: https://amzn.to/3Fzykvm
1/2" x 1//8" chain: https://amzn.to/3Pe1Ivz

Jetson Bolt Pro review:    • I BOUGHT the CHEAPEST eBike at Costco...  

0:00 intro and materials
2:37 replace crank
14:09 test ride
16:43 conclusion