Softail is PERFECT for ebike

As I understand it, softtail is going to have a soft damper, but no real travel. Often, there is no pivot on the bottom end of the frame, and they just let the metal flex a few mm.

So perhaps the proflex is really more like a FS, but of the XC type with short travel to minimize pedal bob.

While shock setup remains cruicial if you want to minimize pedal bob, even the most primitve 4 bar linkage bikes can be set up so pedal bob is not excessive. Such as the blackcomb from wally world, or the genesis.Mongoose blackcomb commuter.JPG

Part of why this bike got made into a street commuter, was the primitive suspension bobbed like mad, unless set up extremely stiff. The 5 inch travel was pretty useless if you have to crank it down till it barely moves. I'd ride up the trail, then back off the screw about about 3/4 inch, then ride down the trail. PITA. Now it makes a fine street bike, with the shocks all set up stiff as hell. Pic of that bike before, that shows the shocks better.

Something about all the link and pivot designs does wonders for minimizing pedal bob, compared to those that basicly have the shock connecting the seat stay to the frame.

The best bike I've ever ridden for minimal pedal bob without overtightening the preload is an XC bike design, the specialized FRS. Oatnet made a superb ebike from one, but I left mine a pedaler.

As always though, we make do with what we can get nice and cheap. 8) That's how I ended up with a couple blackcombs.
 
how about this one,
Specialized Ground Control A1

5254150_25645846_155.jpg
 
I looked at buying that exact Specialized Stumpjumper on craigslist a few months ago. I decided against it since it only had an inch of travel, which is what I have now. But the girl wanted $200 for it, so I passed it up. It would probably been good, like my Proflex, but not worth $200 IMO.

My proflex has a real pivot, so perhaps it is FS and not a softtail. It's just that the travel is so little, I can't really call it a FS. Maybe with the normal elastomer that it came with, it would have more like 2- 2.5" travel and some damping which would be nice. $50 for a new elastomer, might be worth it.
 
Good call. $50 bike, maybe $100 if new tires and tubes still smell like a tire store.

Anything with an actual pivot is techically FS in my book. But there are degrees of FS, and that is more like comfort bike level ( 50-80mm travel) than dirt bike FS.

An inch of travel is enough to do wonders when you are riding over heat cracked pavement all day. I can do 5 miles on hardtails before my back starts screaming, but with an inch of travel I can do 60 miles and the back doesn't mind. The ass might, but the back will be good. Same thing applies to the rims. Waaaay less broken spokes.
 
A lil off topic, but all this talk about pedal bob is making me show love for my GT iDrive. The BB design on these things was a stroke of pure genious. 0 pedal bob. I've put probably over 5k miles of trail riding on mine (non assisted) since buying it back in 03 and it's still going strong. I love this bike.

gt-01-i-drive-5-0.jpg
 
I visited the proflex 555 for sale today on CL, omg! the rear spring is cool!, front shock is also very stiff. It feels like a hardtail but takes a big bite out of road irregularities.. i love it!
It's also light as hell and has a steel rear swingarm.... will be picking it up tomorrow!
 
http://www.ebay.com/itm/Cane-Creek-Thudbuster-Elastomer-Med-Blue-Single-/110780422189?pt=Cycling_Parts_Accessories&hash=item19cb07182d

I wonder if these elastomers would work.
 
Nice find sk8 :) :)

I keep hearing those elastomers are good for a year or two then they're kaputz. So i'm stickin' with a hard spring. This bike is just for street use so i oughta be just fine.
 
Could this shock fit? http://www.chainreactioncycles.com/Models.aspx?ModelID=30458

Hmm, guess not, looking at the pic above. If it's steel, you could weld the mounts to use such a shock. It would be a huge improvement. I looked there (CRC) for elastomers and didn't find any. Thudbuster ones worth a try.

A spring with no damper is just a pogo stick shock. Ok if the travel is really only a half inch. Beats bent rims.
 
I could spend $70 on a rear shock for my proflex, but then I came across this yesterday:

The softtail was a lot better than the hardtail, but still not good enough. For $150 this KHS which is the same design as a 2000 FSR, has good real FS travel. Rock Shok Duke up front can take some good hits.

I just need to figure a way around the battery mounting. Or go full lipo. Then build some mechanical lockouts.

The Proflex may end up being my pedal trail bike, since I like the power transfer.
 
Here's a video of a softail pivotless rear suspension being tested:
http://www.biketesting.com/RearSuspensionTestInOut.MOV
 
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