Aerobike x-ride review and modification plan

Random Joe

Finding my (electric) wheels
Jun 14, 2017
13
9
44
london
I have my aerobike x-ride for 3 months now and I would like to share a bit of my experience.

Battery:
I use aerobike for commute to London city centre. About 13x2=26 miles each day. I used up 20% when I paddle a bit harder. It could use up 80% when I am feeling lazy. Although the battery is small, it is more than enough for my usage.

Front wheel drive:
This is my first e-bike. I was worried about the front wheel drive could be wobbly at start. After start riding it, I can tell you no problem at all. Maybe it's well design and built, maybe it's because 250W motor isn't powerful enough to cause issue. Either way, it is very good.

2 speed Automatix gear:
Compare to single speed e-bike like G-Tech at slightly higher price. 2 gears definitely boost your max speed. However, it comes with a bit of downside. First issue is high gear seems kick in a bit too early automatically. Secondly, it might stay at high gear when you stop at traffic. This make it difficult to start up...
It's a bit trade off. Either single speed or slightly funny 2 gears. With a bit of experience, I can manage it fine and still will go for funny 2 gear option if I have to choose again.

Electric control:
It has delay. You have to paddle half turn to kick in the signal plus the delay. So that's about 1.5 second lag at least. This is definitely a down side for this bike when compare to G-tech which is £250 more. My worst nightmare is stop at uphill traffic light with gear stuck at high ratio and I have to paddle first half turn plus the delay to kick in motor...

After all, I think this is the best bike you can get at this price range. I was comparing between
1). G-Tech at £1000
2). Aerobike at £750
3). Ampler bike at £1750
I think I made the good choice on my first e-bike although my next bike will be Ampler bike.
 

Random Joe

Finding my (electric) wheels
Jun 14, 2017
13
9
44
london
I been thinking how to make my aerobike x-ride better. My plan is to replace SRAM Automatix 2 speed gear hub
to:
Sturmey Archer SRF5 (W) Internal Gear Hub 5 Speed
Specs (for 119mm OLD spacing)
  • Hub Shell Material - 6061 Aluminum
  • Axle Diameter - 13/32” Slotted
  • Axle Length - 175mm
  • Over Locknut Dimension - 119mm
  • Right Axle Protrusion Length - 24mm
  • Left Axle Protrusion Length - 32mm
  • Spoke Holes - 36
  • Pitch Circle Diameter - 67mm
  • Center to Flange Right - 27.6mm
  • Center to Flange Left - 29.0mm
  • Flange Width - 53mm
  • Spoke Compatibility - 13g or 14g
  • Sprocket Teeth - 13T through 22T
  • Chain Line: 1/8” Flat 45.6mm
  • Chain Line: 1/8” Dished 44mm, 47.4mm
  • Chain Line: 3/32” Flat 45.3mm, 45.9mm
  • Chain Line: 3/32” Dished 43.5mm, 47.7mm
  • Indicator Chain - HSA585 Mark Yellow
  • Weight - 1090g
Gear Ratio

• Overall Range - 256%
• Gear 1 - 62.5% (-)37.5%
• Gear 2 - 75% (-)25% (Gear 1 + 20%)
• Gear 3 - 100% Direct Drive (Gear 2 + 33%)
• Gear 4 - 133.3% (+)33.3% (Gear 3 + 33%)
• Gear 5 - 160% (+)60% (Gear 4 + 20%)



The SRAM Automatix has gear ratio at 1:1 and 1:1.37. It would great to have more gears to overcome kick in delay at start. It would also speed up even further at higher ratio.

One of the trouble I found is aerobike x-ride has 119mm OLD which is a bit rare. Not many budget gear hub can fit. Fortunately, I found Sturmey Archer SRF5(W) can fit 119mm OLD.

I don't know if this is possible. Anyone know much about this?
 
Last edited:
  • Informative
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