Dahon Formula S18 Folding Bike, White, One Size

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Product Feature
- 18 speed Shimano Drivetrain with Tiagara derailleurs
- Classic frame and latch for ultra durability
- WTB double wall rims with Black stainless spokes and Schwalbe high pressure tires
- AVID high performance mechanical disc brakes
- High speed commuter with the quick classic fold you have grown to love
Product Description
The Formula is performance and durability wrapped into a small package. This high speed commuter comes with an 18 speed Shimano drivetrain to get you to your destination with both grace and speed. Every part down to the beautifully CNC machined crank and Avid cranks is best in class.Dahon Formula S18 Folding Bike, White, One Size Review
I bought a Dahon Formula S18 from Amazon about a month ago. It was shipped free 2-day because I'm a Prime member. The bike arrived with one of its wheel reflectors broken, a minor problem. I briefly chatted about that with Amazon rep, who was very generous in accommodating me.PROS
* Excellent quality and finish.
* Fast and fairly maneuverable. Generally quiet.
* Aluminum frame is light. Folds quickly and compactly.
* OEM sticky tires provide plenty of traction on pavement, even when wet. Seem tough. No flat yet. 80 PSI good.
* Disc brakes provide excellent stopping power.
* Adjustable handlebar height allows for desired posture.
* Handlebar grips are excellent.
* Rear derailleur works well. Front derailleur only OK but I don't use it much. I keep it on low gear.
* Adjustable height seat is hard and somewhat comfortable, not cushy.
* When folded, allowed on my local public transit, any vehicle, at any time, no extra charge. Also easily fits unfolded in bus rack.
* The handlebar and seat position adjusters hold well, if you set the right tension.
CONS
* On arrival the front derailleur was out of alignment/adjustment. Easily corrected with hex key and screwdriver *if* you know what you're doing.
* When you pedal vigorously, the frame creaks. Haven't localized the flexure yet.
* Magnets on the wheel hubs are supposed to keep the bike folded, but they are not strong enough.
* The bike cannot be rolled when folded. Must be carried.
* Even with 18 speeds, would be nice to have an even lower gear for steep hills.
* The slick tires would be risky in winter snow/ice. Also, up to pressure, they slip in deep dirt.
* Not much room on bike for accessories. They tend to get in the way during folding. I did mount a headlight and bell on the front handlebars.
* When bike is locked in public, the seat could be stolen in two seconds. My cable lock cannot fit through the seat. I had to buy a seat leash.
* When bike is folded, the front gear is exposed, which could poke someone or smear grease.
* No chain guard so need rubber band on right pant cuff.
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