Folding Bikes - Dahon Speed D7
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07-02-10, 01:36 AM
Looking into getting a D7. Was wondering how current owners customize their own. Like adding bar ends, changing tires and such.. Either to make it look cooler or function.
the bars are a standard size 25.4mm MTB size, so you can easily add on MTB bar parts on it.
07-02-10, 01:55 AM
My fave bike. Upgrades are in the eye of the beholder. The D7 has evolved a lot since 2006. On mine the only real upgrades are an MTB riser bar and new grips. It gives a bit more flexibility in the cockpit. If you want a little lighter bike with a very small upgraded spec the USA Dahon Mariner (UK Vitesse ) has an alloy frame and slight cosmetic upgrades for not much more more money. It's a little lighter, too.
Even the stock tyres on the D7 are good. But customise away, whatever you get. The usual first option is a new saddle. :)
Everything you add increases weight and decreases portability as you're about to discover. :)
Bolting stuff on the handlebars can prevent the bike from folding completely, too.
07-02-10, 02:08 AM
Thanks for the info. How about changing the BB and Cranks. How are the stock components? I have a road bike, so I'm used to that type of performance, but i also understand i can't get that from a d7. I won't mind changing some of the components for better performance. The idea of different handle bars is good.
stock cranks and BB are heavy, but there's no point replacing them.
first thing I would change out are the grips and saddle.
the tires are surprisingly good, but lack some traction.
07-02-10, 04:04 AM
Get the bike first. You won't go any faster by shaving 200 grams off the chainwheel. If you've got upgrade-itis before you've bought it, why not just buy a more expensive bike?
The D7 is a mid-weight 12 Kg, easy to fix, steel, Dahon cost-effective folding commuter with a top speed; leg -dependent - of about 22 mph or so. It's not a lightweight, and it's not a performance bike. Adding hardware won't make it so. About all you can do is lower the riding position for less wind drag, and fit skinny tyres for less road drag and skinny rims for slightly better acceleration.
The B/B is a standard cup, cone, and spindle. 150 year old tech. The square taper cranks are forged alloy. The BB shell and spindle size is a 68mm x 113, English thread, and a Shimano UN54 will fit. You will save almost no weight by fitting one. The stamped and ground chainwheel is steel with a plastic guard. And, you will save almost no weight again by fitting an alloy one as alloy chainwheels are mostly 30% thicker than steel ones, and thus (generally) approach them in weight.
The wheel hubs are cup'n cone, and are not especially freewheeling, the rear has a rubber seal which rubs against the hub body by design adding friction. The folding pedals are sturdy - read 'not light'. The handlebars are shot-peened alloy. MTB spec. You won't find lighter.
The D7 is the John Deere of the bicycle world. It's only as fast as your legs are, regardless of what you do to it.
You want faster or lighter you need a different bike or different legs.
What is worth doing is fettling the existing rotating parts: You'll need a chain-whip, a Shimano HG cassette socket, two cone spanners, a C wrench, a spoke nipple tool, a dog-bone spanner, allen key set, and some Teflon grease. If you put a split link in the chain it will make cleaning it a lot easier.
All worthwhile upgrades. You got spare cash, fit the Kinetix wheels and or Kojak tyres.
with all those upgrades, you might as well start off with a Vitesse P18 or Mu P24
07-02-10, 09:55 AM
Go for a MU P8 or Speed P8 for something cooler looking and to customize. Thor has a Speed P8 for $500 http://www.thorusa.com/dahon/accessories/oneoff.htm I am in Lynden, have it sent to my house and pick it up here.
The only thing I did to mine was ditch the crappy stock tires for some Schwalbe Big Apples.
07-02-10, 10:54 PM
Well i guess i should just aim for a different folding bike. I've seen some on craigslist for like 300, so thats why i was asking. But i did buy a mup8 for my GF. I might just get a white one for myself. Thanks guys for the input lol.
07-05-10, 02:55 AM
I would not mind a white bike, especially if it looks like this :)
07-05-10, 09:22 PM
Oh wow, those wheels look so nice.. maybe I'd do that when i finally get a white mu p8... well something similar
07-06-10, 11:53 PM
To be honest, I would not mind buying a cheap D7 at Craigslist and then customize it the way I want. As a matter of fact that is what I will most likely end up doing sometime soon!
Things that I will probably add if I can find it for $250 or less:
+Marathon supreme tires
+TT brake lever
As long as you are not trying to break any speed records I think that these bikes can be "pimped" rather nicely. And the cheaper you get them the more $$$ to customize them. Here's some inspiration:
07-07-10, 01:51 AM
The post 2006 (in the UK?) models have the telescopic handlebar post, and permit tom-foolery with lower bars and such. The US 'Mariner' (UK Vitesse) has an alloy frame and that delicious little welded fillet at the seat tube. For customising the drive train, the bottom bracket can easily be changed from the 68mm x 113mm English thread type to a 68 x 122 which opens up the world of triple chainwheels. Thor in the USA stocks the front mech adapter.
The 'Speed' type frames are good looking and a good ride, I think, for more 'speed' a wheel-ectomy will give the greatest benefit, followed by lower bars, and a gear range increase up into 100" territory. None of this is cheap. :)
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