HP Velotechnik Steps E6000 Front Boom Quick Adjust adult bicycle helmets You need to have 1/2"

You need to have 1/2" of bottom bracket shell available between the derailleur mast welds and the crank in order to clamp this on

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20 1/2"  Height of seat back

5 nylon screws (1/4 x 1")

and it means super easy setup and maintenance

HP Velotechnik Steps E6000 Front Boom Quick Adjust adult bicycle helmets You need to have 1/2"The HPV quick adjust kit is perfect if you have one HPV trike and multiple riders of different heights, adjusting your trike just got simpler. The Quick Adjust Kit allows you to move the boom in and out on the trike without having to add or remove chain links to your drivetrain.