Electric Bikes - 25-30 mph hour without a front suspension?

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pengyou
10-18-07, 09:16 AM
The roads that I bike on regularly are pitted and irregular grooves, ruts and small pot holes. If I ride an ebike without a front suspension at speeds of 25 mph am I asking for trouble? Am I likely to be shaken to pieces?
evblazer
10-18-07, 09:37 AM
I ride a loaded fuji touring bike (270lb me + ~70lb bike) on many roads that are as you describe at 25+ mph when it is flat or a slight decline and it doesn't fall apart. I usually avoid the potholes and anything that would really jar the wheels though. I have 700x32 tires on hand built 36spoke wheels and ride it through really crappy gravel, glass, ruts and alot of other crap I wouldn't ride my road bike through.
It is really going to depend on your tires/wheels and if the bike is any good, cheap front suspension bikes are probably worse then not having it at all. Plus it depends on if your just going to ride in the gutter regardless of what is there or if you are going really bad stuff like where two contrete sections meet and there is a 3+ inch height difference (2 place is my commute like that).
There are a few places with 4+ inch gaps that cross a whole lane and although I can't really bunny hop my bike I can take my weight off of it briefly and make it so it doesn't fall into the hole and get really whacked.
I have cracked rims on front suspension bikes so they won't save you from potholes if you hit them often or even just one bad one hard enough. Mine cracked when I went into them riding through flooded or snow covered streets where I couldnt' see the potholes to avoid.
Are you using a hub motor or some other kind of drive? My first hub motor had an absolutely terrible rims/spokes that didn't make it far at all.
pengyou
10-18-07, 10:42 AM
Thanks for the input! I want to install a motor on the front with a chain connected to the wheel.
Abneycat
10-18-07, 12:07 PM
It won't be a problem. Roadies ride even faster than that sometimes, no suspension on their rigs (i've got a 40 something year old Peugeot PX10 that does that just fine), and touring loads ^ as stated by evblazer, can reach 275+ lbs easily.
Your bike will take that punishment. I would be more worried about your fatigue, really.
I think you'll find that if you ride a steel frame, get yourself some gel ribbon if you have drop bars, or some very comfy grips for your MTB bars, and a nice saddle, you'll be riding easy.
JeanCoutu
10-19-07, 07:41 PM
It won't be a problem. Roadies ride even faster than that sometimes, no suspension on their rigs (i've got a 40 something year old Peugeot PX10 that does that just fine), and touring loads ^ as stated by evblazer, can reach 275+ lbs easily.
Forum search yeld no results... Pix of teh sexy PX10 plz!
andmalc
10-19-07, 08:13 PM
You see a lot retailers offering Bionx motors bundled with Birdy folders. The Birdy's have prominent front suspension. Maybe this indicates the OP's suspicion is right, that suspension is desirable at higher speeds.
Abneycat
10-19-07, 08:25 PM
Forum search yeld no results... Pix of teh sexy PX10 plz!
JeanCoutu, I haven't got any yet, waiting to clean up the bike and get the original saddle back, which is in Edmonton right now. It is almost exactly the same as this bike http://www.classicrendezvous.com/France/bicycles/Peugeot/PX10_cdO.htm
Albeit that mine was set up for touring instead of racing, so it has Peugeot's big shiny fenders and rear rack on it.