Advertise on Bikeforums.net



User Tag List

Results 1 to 7 of 7
  1. #1
    Senior Member cyclezealot's Avatar
    Join Date
    Sep 2001
    Location
    Fallbrook,Calif./Palau del Vidre, France
    My Bikes
    Klein QP, Fuji touring, Surly Cross Check, BCH City bike
    Posts
    13,147
    Mentioned
    0 Post(s)
    Tagged
    1 Thread(s)

    Anyone notice much difference in thier average speed on different bikes. ?

    Last two days, I have been riding my racing bike for errands.Can't carry as much as on my touring bike, but with back packs one day and a small handlebar bag the other- I was able to complete errands on it..
    Normally when I commute to work on my touring bike with two panniers and a rack with comparable gearing as to my race bike ; I have found I get about 1.5 to 2 miles per hour less than on my race bike.
    The race bike is aluminum and the touring bike is cro moly. Last two days I would say the hills I traveled were actually worse in grade than my route to work( where I use the touring bike.)
    Do you find your average that much different should you ride two different bikes. Maybe when commuting to work, I might have an extra 10 pounds in my pannier..Would that make that much difference.? have to check my touring bike's average on rides comparable to what I rode the last two days on my race bike..Too bad I could not ride my race bike to work.

  2. #2
    Chairman of the Bored catatonic's Avatar
    Join Date
    May 2004
    Location
    St. Petersburg, FL
    My Bikes
    2004 Raleigh Talus, 2001 Motobecane Vent Noir (Custom build for heavy riders)
    Posts
    5,825
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    sometimes it's down to gearing, certain ratios you may not be used to , so you might not get all teh gain you thoght you would.

    My Trek was that way, it was actually SLOWER than my Talus MTB, dueto biopace gearing not allowing me to run the cadences I like, and the poor gear choices in the freewheel used...the ratios offered was more flatland than it was hills, and definately wasnt meant for speed....I jsut could not go over 21mph, period....on the talus I can sprint up to 32 easy, on a good day i can go up to about 37-38. The gearing difference wasn't much, but it was just enough to ensure that it was either too easy to pedal, and requires a significantly higher cadence than I was used to, or it was too high a ger and it was impossible to spin. Part of my difference was my MTB has a 9-speed cassette, and the Trek has a 7-speed, so the treks gear ratios werent as tight as the talus.

    weight makes little difference initially, but over the same distance it does, its an evg speed hit, due to fatigue from having to work with that load. On a bike, a 23lb bike and an 18lb bike should not make any real diff, unless your doing pro racing or long distance tourging, etc.

  3. #3
    Senior Member
    Join Date
    Sep 2004
    Posts
    328
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    could be lots of differences:
    - panniers - high drag
    - different tires, spoke count, spoke size, tire pressure, tire tread - all contributing to aero drag and rolling resistance
    - position on bike
    - gearing as already stated, not necessarily the range but the increments - race setups usually have tight spacings for improved cadence efficiencies
    - is your route hilly, if so, weight will be a factor going up and drag being a factor going down
    - is your route littered with stop and go's, if so, weight will be a factor
    - psychology of knowing(or at least hoping) the racing bike is faster

    why not use the racing bike for commuting ;-)

  4. #4
    Senior Member cyclezealot's Avatar
    Join Date
    Sep 2001
    Location
    Fallbrook,Calif./Palau del Vidre, France
    My Bikes
    Klein QP, Fuji touring, Surly Cross Check, BCH City bike
    Posts
    13,147
    Mentioned
    0 Post(s)
    Tagged
    1 Thread(s)
    - is your route littered with stop and go's, if so, weight will be a factor
    - psychology of knowing(or at least hoping) the racing bike is faster

    why not use the racing bike for commuting ;-)[/QUOTE]
    Boze. I have Should I need to go in for fewer hours than my normal shift.Can't say I recall how fast I went..Was awhile back.
    But, what got my attention, I think the hill I climbed two days ago, on my race bike was steaper and longer, than my grade going to work and I was carrying a backpack! That is not efficient.?
    Going to work, I have to carry work materials, food, clothes..It would be tough to put all that stuff in one backpack. I normally hate backpacks anyway. And going to work in this inland direction is often a very warm ride.

  5. #5
    Slow and unsteady
    Join Date
    Nov 2002
    Location
    St Louis, MO
    My Bikes
    Bacchetta Agio, Bacchetta Giro 20, Trek 520
    Posts
    473
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I have bike computers on my Trek 1200 and Trek 520.

    When on the 520 with just one pannier, I usually average about 12.5-13mph.

    On the 520, with just a seat pack, I can go about 16-16.5mph.

    Differences: The 520 weighs more, has fatter slower tires (700x35/70psi vs 700x25/100psi), has flat handlebars and an upright posture, longer chainstays, etc.
    And the pannier creates more drag. And I'm usually in a different mindset riding the 520 vs the 1200. I recently did a 500+ mile tour on the 520 and averaged over 11mph on a rails-to-trails surface hauling tent/bag/food/supplies/etc. The 520 doesn't go fast for me, but it doesn't go much slower when loaded down, which makes it a good loaded tourer.

  6. #6
    Sumanitu taka owaci LittleBigMan's Avatar
    Join Date
    Mar 2001
    Posts
    8,945
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by cyclezealot
    Do you find your average that much different should you ride two different bikes. Maybe when commuting to work, I might have an extra 10 pounds in my pannier..Would that make that much difference?
    I think so.

    I normally commute with my backpack full of stuff. Yesterday I was going to return a video when I discovered I had no car keys! I had 15 min. to get there on my bike. I hadn't even had anything to eat
    but a half-cup of coffee!

    I jumped on my bike and took off. All I carried was the video (tucked in my shorts behind me.) I didn't even have my battery with me, which would have added weight.

    Man, when I hit the first tall hill about a mile from home, it seemed like I flew right up it. But who can really say, maybe I was having a good day, or maybe I was pumped because I had to get that video back.

    When I got there, I didn't know exactly what time it was, but I had to be close to the cut-off time. I told the guy behind the counter, "I rode like crazy to get this video back by 12." He looked at me and said, "That's ok."

    Then as I left, he followed me out the door and said, "Sir, this is a week-long rental. You won't pay extra until next week."

    Well, what a great excuse for a ride! Now I know the real reason I took off on my bike!
    No worries

  7. #7
    Senior Member cyclezealot's Avatar
    Join Date
    Sep 2001
    Location
    Fallbrook,Calif./Palau del Vidre, France
    My Bikes
    Klein QP, Fuji touring, Surly Cross Check, BCH City bike
    Posts
    13,147
    Mentioned
    0 Post(s)
    Tagged
    1 Thread(s)
    Panniers and well, guess the tires could be factors. My road bike has 26 mm, while my touring bike has 35 mm..The touring bike's tire tread is less slick...Did not think of that.
    I just focused on the 2 1/4 mile hill I did on the road bike and the 1 1/4 hill I do on my commute.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •