SAFE TOP SPEED FOR MB -- is ???

Discussion in 'General Questions' started by Mountainman, Aug 28, 2008.

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What do you feel is the maximum SAFE speed for a motorized bicycle?

  1. 20 or less

    15 vote(s)
    5.2%
  2. 25 or less

    36 vote(s)
    12.4%
  3. 30 or less

    73 vote(s)
    25.1%
  4. 35 or less

    60 vote(s)
    20.6%
  5. 40 or less

    35 vote(s)
    12.0%
  6. Any speed you can reach...

    72 vote(s)
    24.7%
  1. Mountainman

    Mountainman Active Member

    At what top speed - do you MB riders feel safe. When I have to - I ride down to town from the top of this little mountain - 5 miles downhill - it is a fun downhill run with speeds up to - AS FAST AS I WISH TO GO - I try to hold it down to around 30 to 35 mph - can attain easily 45 to 50 mph - but - it does not feel good at that speed. I am usually wearing shorts - tee shirt or tank top - I get thoughts of hitting that pavement that's wizzing by !!! To make it even worse on my downhill runs - the state did not put in a proper bike lane - some places the bike lane is 6" wide - with cars passing VERY CLOSE at high speeds.

    Let me get to the point - SAFE TOP SPEED FOR ME --- 30 mph

    What SAFE top speed do you - try to stick to ???

    Happy Riding
    Ride That Thing -- Mountainman
     

  2. ZnsaneRyder

    ZnsaneRyder Member

    A safe top speed IMO is 30-35 MPH. Any faster than 35 gets shaky and windy and scary! :shock:

    Even though I used to go over 52, it now tops at approx 45 mph with my now lowered belt/axle ratio, I still prefer to drive much slower, and save the top speed for emergencies, and situations when you really need it.

    I Cruise at approx 25-30 most of the time, and go fast on open roads with no cars, or crossing highways to beat the oncoming traffic, or to beat some oncoming rain. Less top speed saves gas, and also belt and tire wear for me too.
     
  3. s_beaudry

    s_beaudry Member

    Bought a cheapie speedometer finally....

    30 miles per hour is the majic number for feeling safety, can go faster, but try to stay below 30!

    Hey znsaneryder, update the thread about your pusher, did you go to jail over that matter?
     
  4. Warner

    Warner Member

    I average about 28mph on my commute, with my top speed each way somewhere around 37 or 38mph. I feel fine at full speed as long as the road conditions are good and traffic isn't insane. The bike feels fine at those speeds. I've said it before, but frankly if I were limited to 20mph top speed, it wouldn't be feasible for me to use the bike to commute to work 20 miles each way. As it is, I can make it to work in about 45-50 minutes, and home in about an hour (a little less actual riding time, but it takes me time to gas up, change clothes, load my bags, unlock the bike....all the stuff I don't do in the morning when I leave for work). I do a couple miles of pedal-only bike path on the way home, but not on the way TO work (too much traffic on the way home; it's more broken up in the morning). For reference, my commute by car usually takes 30 minutes each way, unless there construction, an accident, etc.

    Warner
     
  5. Mountainman

    Mountainman Active Member

    Makes sense to me ZnsaneRyder -- for me anyway - get's a little shaky (also) at around 40 mph and over.. With my little engine on the flats 22 max anyway -- but wow am I fast downhill !!!
    Ride That Thing - Mountainman
     
  6. arceeguy

    arceeguy Active Member

    Ralph Nader would say a MB is "unsafe at any speed". :puke: But I would say that 20-25mph is a speed that is comfortable with a bicycle, motorized or not. (but try and keep a 20mph pace without an engine!) If laws are passed specifically defining a pedal bike with an "add on" engine a "motorized bike" and not a moped or motorcycle, they will most likely limit top speeds to less than 25mph
     
  7. Rain City

    Rain City Member

    30 seems fast and my engine sounds and feels like its about to jump off my bike and run away!
     
  8. Accender

    Accender Member

  9. bikebum1975

    bikebum1975 Member

    Hey 30mph seems fast on a MB think about the guy riding the Tour De France down hill they average 60 mph in some spots and the ride skinner tires I am a pedal biker right now and I can get mine up to 20 mph easy feels fine to me so I think safe is a matter of what feels safe to the individual rider. Also I agree road conditons are a big factor too. I'll most likely cruise close to 30 mph when I get my bike next year.
     
  10. Ypedal

    Ypedal Member

    30 mph is just about the magic number.. but it depends on alot of factors.

    Above 30 mph requires alot more power ( electric ), at one point i had things volted and geared for 50 mph but at those speeds the tires strech !!! :shock: and you have to lean and counter steer like a motorbike.

    On the BMX, 30 mph " feels" alot faster, lower to the ground, sharp steering angle and flaky brakes ...

    On the full suspension rig with dual disk brakes however, ( Norco Chaos ), up to 35 even into the 40's feels nice and solid, i have the thickest tubes i could cram in the tires and run 50 psi front and back with 2" wide rubber.

    The folding bike , it was max 25 mph, the frame had too much flex in it for comfort, one pot hole and it's lights out...

    Recumbents, i have limited experience, but i built a BikeE with a 500w cyclone chain drive setup, had a polycarb fairing on it, 40 mph on that bike felt smooth , but the 16" front wheel scares me..

    Yeah. 30 mph, sound about right for most bikes..

    All " Go " and no " Whoa " makes for a bad bike..
     
  11. Accender

    Accender Member

    Tour De France quality bikes are fine at speed.
    Sealed bearings, safety wired, titanium etc..

    Most here ride K-mart quality.

    Test pilot to K-mart control...........I'm ready!!

    LOL

    A
     
  12. Warner

    Warner Member

    I'm finding that I SLOW DOWN to 20 to make turns (and my tires are only 1.5" wide). If my bike was limited to 20 mph, it would not be practical for me anymore. It feels FINE at 30 or even 35. After that I start feeling like I'm on a motorcycle again. I'd say anywhere between 30 and 35 is good. I'm not riding a Wally World or K-Mart quality $100 bike though either. It's an older Trek, but high quality, Chromoly frame and fork, etc. I'd be scared to put an engine on a bike that started out new at $100, but that's just me. Maybe that's the difference between feeling OK at 35 and feeling unsafe?

    Warner
     
  13. graucho

    graucho Active Member

    On a MB 20 mph is my magic number for comfort. And it still legal.
     
  14. Accender

    Accender Member

    roger that

    A
     
  15. With engine off clutch in whatever kit any speed feels safe to me down a hill.
    On straights and up hills 12 to 16 mph feels safe. 20 to 25 feels manageable. Any faster and engine no like. Engine no like? I no like.
     
  16. eastwoodo4

    eastwoodo4 Member

    i bet a flat would be fun on a bike at 35.
     
  17. veloman

    veloman Member

     
  18. veloman

    veloman Member

    Not that bad at all.

    I've had a front flat tire on my road bike at 45mph, a couple hundred feet before a busy intersection. I kept cool.
     
  19. veloman

    veloman Member

    That's the problem I think here. Many people are riding junk bottom of the barrel bikes. No duh they are going to be sketchy above 30mph.... :rolleyes:
     
  20. Happy Valley

    Happy Valley Active Member

    20 mph. Rim brakes. Nuff said.
     
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