Why isn't there a "Type" for Road Bikes?

Discussion in 'High Speed' started by Alan Acock, Dec 5, 2016.

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  1. Alan Acock

    Alan Acock Member

    The electricbikereview.com is wonderful. This post is not met to be critical of this wonderful resource.

    I'm a road bike rider in my 70s and finally realized I can't keep up with the younger riders in my club (or some old ones who are just plain better riders than me). I got a Trek XM700+ after watching Courts review of it and love it. I do 30-50 mile club rides once or twice a week.

    It seems like the development of ebikes is focused on commuters and off road riders. Both are great! But, what about us road bike riders? Although I love my XM 700+, it cold be a lot lighter without much design work from Trek. It would be nice to have a Type in the forum that focused on Road Bikes.
     
    niteman and Court like this.


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  3. Ravi Kempaiah

    Ravi Kempaiah Well-Known Member

    Actually,
    TREK's global service manager rides a modified XM700. There is a pic in this thread
    https://electricbikereview.com/forum/threads/dail-e-grinder.8972/
     
  4. Court

    Court Administrator Staff Member

    Hi @Alan Acock! I've created a category on EBR which lists road-style electric bikes which tend to be lighter weight and some even have drop bars. If you haven't seen it yet, visit here: https://electricbikereview.com/category/road/ and as for the EBR forums, I hadn't created a sub-section yet because it didn't seem like this category had as many reviews or as much activity yet, I could add one though if you'd like :)
     
    niteman and Ann M. like this.
  5. niteman

    niteman New Member

    I agree on all counts with Alan and look forward to more productive comments. I'm 67 and for a variety of reasons I need some assistance in order to ride. I purchased a Giant Road-E and I'm in love. Back riding with my bike club and no issues with keeping up. Court, keep up the great work.
     
    Last edited: May 4, 2017
  6. Goodair

    Goodair Member

    Coverted, put some drop bars on it and you are good to go!!!
     
  7. niteman

    niteman New Member

    That's a nice bike but it would never fly with someone who rides a road bike. Everything is incorrect including the geometry which can't be changed. Shfters, brakes, gears,wheels, tires.gears........the list goes on and on as to the changes required..
     
  8. Rincon

    Rincon Active Member

    Don't forget the electric motor.
     
  9. JRA

    JRA Well-Known Member

    I think that e road bikes make a lot of sense and made a couple based on drop bar bikes with front hub motors. I feel that for road use hub motors work plenty well enough and allow for more freedom of choice for gearing and separation of the gearing from the motors torque means you can shift whenever you want with impunity. This does not mean that a mid drive is bad, it is just my experience.

    The reason I have a front hub motor is for more even weight distribution with the battery in the triangle and my weight mostly going towards the rear. I have a couple thousand miles now on this setup and really like it. The two wheel drive feature is useful also and I like the way the bike pulls instead of pushes. No odd handling traits that I can discern nor others who have ridden them. Even easy to unweight the front wheel when avoiding pot holes which surprised me even.

    Having been mtb'ing for the last 35 years and only riding roads enough to get to the next trail these bikes have been a real revelation to me and the possibilities of e road bikes going forward. I am a bit put off at the manufacturers in that they are putting so much emphasis on e mtb's instead of e bikes potential for use on existing motorways. It does seem that a few of the makers are doing drop bar bikes and I am thinking they will become popular. I know that the majority of commuters where I live ride drop bar bikes and perhaps this will entice more of them to get with the e program.

    The bikes have 1000w, legal in my state of OR, motors and run at 48 and 52v. I have found that I like to ride mostly in the low 20's as it affords the best range but also like the option to open it up now and then or have more on tap for hills and headwinds. I have gearing high enough to support the motor at all speeds and like to pedal on top of the motor for the most part to get a decent workout and help with range. I run as big a tire as I can at as low of a psi as I can get away with to absorb road chatter and don't feel the need for any other suspension. Fenders, lights and carrying capacity round out the utilitarian aspect.

    unnamed-1.jpg

    I managed to drop a considerable amount of weight from v 1 to v 2 but they both end up performing pretty much the same in the end.

    If anyone reading this is in the PDX and wants to try out the concept hit me up!
     
  10. JRA

    JRA Well-Known Member

    In order to get the gearing range I want I use Schlumpf bb drives for the above bikes. I got turned on to the concept back in 1999 while attending Interbike and got a Speed Drive, 1:1/1:1.65, in time for the 2000 riding season. That drive has a lot of miles on it now and has been mostly on this bike since new and still works great.
    IMG_4257.JPG

    The next year Schlumpf came out with a high speed drive, 1:1/1:2.5, and I got one of those as at the time I was experimenting with ICE motor assist and wanted a higher gear ratio. Never really got that off the ground and it stayed in the parts pile for a long time but always had a motor assist mission in mind for it. When I built the black bike up last summer I took off the stock cranks and finally got to put it to good use. As I thought years ago the high gear ratios attainable with it are great for being able to be able to pedal on top of the motor at any wattage.

    When I put together the silver bike I took the Speed Drive off my Townie and installed it on it. But although it rides and shifts the same it lacks the top end capability of the High Speed Drive. The other day I had the bikes together and was doing some routine service work on them and decided to swap the drives around while doing so. On the black bike I have a 9c speed wind and the fastest I could record while pedaling on flat ground was 34 mph @ 1200w. The silver bike with the Speed Drive would spin out pretty much @ 26mph although you could coax it faster by spinning way more and with the motor up to 30+ a bit. After swapping I took the silver bike out for a speed run and recorded a 36.6 mph with perhaps a little more to go but I ran out of straight stretch, although it didn't really take too long to get up to speed.

    The overall high gear with the Speed Drive is a 114" gear and with the HS Drive it is a 171" gear. Big difference for sure and what it really allows for is the ability to vary my cadence some while cruising in the mid 20's. Otherwise they both work really well for use with a hub drive motor and I am just glad that I got mine when they were half the price they are now!

    I am not apt to go that speed much, if at all, during my normal rides. But I do like the gearing range afforded with the Schlumpfs and a cassette/derailleur system and how it pedals the same as my non motorized bicycles which I still enjoy riding.