Review: MiRiDER One GB3 - funky looking foldable e-bike whose electric assist blends nicely with human power… cycling
. It retains the funky-looking single speed fold-in-half style magnesium frame with integrated but removable battery, mid-frame elastomer suspension and adjustable height handlebars and seatpost. However, the GB3 gets three gears and a host of other spec upgrades.
The biggest bonus of not going down the derailleur path however is that by maintaining a single chain line MiRiDER has been able to fit a belt drive, meaning no oil to get on clothes and no regular maintenance. In design terms at least, this looks like a great solution for a folding e-bike, with the only proviso that - like hub gears - the Efneo adds quite a bit of weight and expense to the bike. As ever in the world of bike design, you can't have your cake and eat it.
It's possible to get such impressively economical figures as even at the lowest assistance level the power keeps on coming right up to the assist cut-out limit of around 16mph. This means you can ride it with just a small amount of assist if conditions are fairly benign, rather than having to dial up the power levels to get more speed.
Times up our extended hill climb were average - although it's based on a long list including many powerful mid-drives. Compared to most other hub drives, the GB3 was ahead of the pack and ahead of just about all other small hub motors by a few seconds with the exception of the remarkableOn our short ultra-steep climb it made it easily to the top in reasonable time and would have been quicker were it not for the rider guarding against wheelie syndrome and pedalling evenly and quite gently.
Another useful data field is the one showing watts of motor power being delivered. Once you get used to what power the motor produces in different levels it lets you keep a check on motor behaviour. In the lower two levels you might expect to breeze over gentle gradients only using 50 or 60 watts of motor power at most. Hit steeper hills and in the higher power levels the motor can sustain well above 480 watts.
. Things have moved on since then and it now comes in the newly introduced C line and P line variants spanning a price range of £2,800 to £3,775.
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