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Nov 20, 2008 · While we wrote about chainless mountain bikes back in September, Trek is the first bike company to use the technology in a mass produced bike. The Trek chainless bikes, the District and Soho, are commuter / recreational bikes and will be available starting next month for just under $1,000 each.
- Company
- Price
- Weight
- Chain Versus No Chain
- 8-Speed Versus 21-Speed
- Riding
- Warranty / Satisfaction Gaurantee
- Conclusion
Dynamic Bicyclesout of Rhode Island has been producing a small line of chainless bikes for the past ten years. They have a few models of street bikes, a hybrid, and even a folding bike. Instead of a chain and standard dereailleur, the bikes feature a shaft drive (by Sussex) and internalgear hub (by Shimano, the same type used in some trikes). Beyon...
The Runabout 8is a hybrid bike (available in 16", 18" and 21" inch models). Although it has a list price of $999, I have never seen it sell for that. Recently, itwas on sale at 40% off for $589 (or 30% off the "Premium" version). It seems the normal discount is 25%-35% from list price.
The Runabout 8 weighs 31 pounds, which makes it about the same as a 2004 Trek 7300 hybrid (30.8 pounds) and a bit heavier than my 21" 1998 Trek 6800 mountain bike (27.4 pounds). The bike uses a Shimano twist grip shifter but can be custom ordered with a speed shifter instead. A few accessories can be ordered from the factory, but all are standard o...
Going chainless has many advantages, but the main one is simplty not having a chain to maintain or deal with. Changing the back tire becomes a very simple thing involving removing a dust cover, losening two bolts, and undoing a cable before sliding the tire out. Compare that to the mess an inexperienced biker (like myself) might have doing the same...
Dynamic Bicycles has a gear ratio chartthat shows how the 8-speed Shimano hub covers about 90% of the range of a 21-speed bike, just with larger gaps between the gears. It also avoids the redundant gears (where a high speed of one gear is the same as the low speed of the next gear). For casual bikers that might primarily stay in the middle range (s...
With the 700x35c wheels, with seat post and front suspension, it rides and feels very much like the Trek 7300 hybrid does. The same caveats about street bikes versus mountain bikes apply, and it's a rougher ride than what I am used to on my Trek 6000. The ability to shift from lowest to highest seems to give much more abiliity to use "all" the gear...
The shaft drive is covered by a limited lifetime warranty against manufacturer defects. Outside of that, a replacement is $129. (I have no idea how much it costs to replace a derailleur for comparison.) Dynamic Bicycles also offers a 30 day satisfaction gaurantee (with a restocking fee) to take some of the risk out of buying a bike mail order.
After a half dozen rides of about 100 miles or so, I wish I had gotten one of these years ago. (Though, earlier generations were not as good so maybe not.) I love not accidentally getting grease on me every time I load the bike in to my car, and now I find myself riding in a higher more regularly than I ever did with my 17-year old Trek. For dozens...
In this article, I’ll introduce you to a very special chainless drivetrain that uses Dyneema ropes to propel you forward. These bikes were produced from 2011 to 2021 and used similar ropes to those found in fancy bicycle spokes, paragliding lines, sailing ropes, and even human-powered helicopters.
Nov 15, 2022 · In this article, we’re going to explore the world of chainless, digital drive bicycles. Advantages of Digital Drive. The Bike2 digital drivetrain looks like it might be fitted to cargo bikes soon. Image: Bike2.dk. There are many advantages to digital drive. Firstly, you lose the chain.
Apr 23, 2024 · In this guide, we take a deep dive into the chainless bike. We'll compare shaft drive vs chain drive and talk about the advantages and disadvantages of both systems. We'll cover efficiency, weight, parts, performance, cost, and more.
Friction Facts have tested a singlespeed chain to be about 99% efficient at 150-watts (2-watts drag), and a belt drivetrain to be 98.6% efficient (2.45-watts drag) at 250 watts power output. Using this current data, it would mean a shaft drive is around 92% efficient (12-watts drag).
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