Go Back  Bike Forums > Bike Forums > Folding Bikes
Reload this Page >

Dahon Speed D7 Street questions

Notices
Folding Bikes Discuss the unique features and issues of folding bikes. Also a great place to learn what folding bike will work best for your needs.

Dahon Speed D7 Street questions

Old 04-26-20, 02:38 PM
  #1  
dolt
Newbie
Thread Starter
 
Join Date: Mar 2020
Posts: 4
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Dahon Speed D7 Street questions

Hi-
I'm a novice rider and you guys helped me out a few months ago with some great advice, so I'm back with two more questions:

1. I bought my Dahon Speed D7 Street brand-new less than two years and since I'm a casual rider, I've only put about 275 miles on it. A month ago, I hit a pothole badly and immediately the chain started slipping on my 7th gear; now 7th is basically unusable, though all the other gears are fine. The rear derailleur seems to get stuck if you 'dig in' while pedaling and gets pulled into a near-horizontal position; I think that's when the chain slips, but it's hard to tell because I'm riding when this happens and it's hard to look down there and not crash.
I took it to a shop the other day and the guy diagnosed it, saying I need a new chain and gear set because I'd worn down my 7th gear. Like I said, I'm a complete novice so maybe I have no idea what I'm talking about, but that sure seems like a short lifespan for a gear set. Since the derailleur gets stuck, is that the problem, or is that a symptom of a worn-down gear?
Either way, I'll have to get it fixed, and yeah, I'm sure replacing everything whole-hog will do the trick, but I at least want to learn something and explore all options before I throw $150 at a problem on a $400 bike.

2. I'm debating on replacing the stock Kenda 20" x 1.75" tires it came with. Any suggestions as to what might be appropriate? I've seen Big Apples mentioned a lot here on the forum, but they don't seem to come in sizes smaller than 20" x 2.00" and I'm not clear what the benefit of those specific tires are anyway other than they're what everyone seems to use.

Any insights would be really appreciated. Thanks!
dolt is offline  
Old 04-26-20, 03:47 PM
  #2  
termv
Senior Member
 
Join Date: Jun 2018
Posts: 62
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 20 Post(s)
Liked 3 Times in 3 Posts
Advice

Sorry for your problems,

Maybe you can bend the rear derailleur back in shape if not upgrade to something like a Acera M360, price is around $22

​​​​​​However, is your hanger still fine?

Good thing your bike is basically made from steel.

Tire wise you could indeed go the Schwalbe way, OR Maxxis.

Maxxis has some good choices like Hookworm in 20x1.95, or the Ringworm also in 20x1.95. However. I would definitely not pump them up to 110 PSI for obvious rim reasons.

The Wall which I no longer see available was 20x2.10 (70 or 75 PSI) was an excellent choice too.

Currently I am waiting for a set of Maxxis Max Daddy 20X2.0 (40 PSI). Hopefully I don't have to to take the Fenders off. If I can only have the Daddy on the rear but keeping the Fenders on than I am still happy.

In the back, MAXIMUM is 2.10! The chain will otherwise rub against the tire!!!

At that size you MUST change the Fenders in order to accommodate them.

Thorusa is a good source for the fenders.

Hope this helps.

termv is offline  
Old 04-26-20, 06:28 PM
  #3  
3speedslow
Senior Member
 
3speedslow's Avatar
 
Join Date: Oct 2010
Location: Jacksonville, NC
Posts: 8,257

Bikes: A few

Mentioned: 110 Post(s)
Tagged: 0 Thread(s)
Quoted: 1580 Post(s)
Liked 366 Times in 271 Posts
The schwalbe Marathon racer is an excellent tire and won’t cause fit problems
3speedslow is offline  
Likes For 3speedslow:
Old 04-28-20, 07:56 AM
  #4  
bikebikebike
Senior Member
 
Join Date: Jul 2006
Location: TX
Posts: 310

Bikes: Downtube IX NS&FS, Dahon Speed8Pro/Matrix/Curve, Brom S2L,Montague Para, ICE-XL w/Rollie/Schlumpf, Trident Spike, ebikes, BFSatRDay

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 103 Post(s)
Liked 40 Times in 37 Posts
Derailleurs get buggered up easily on MTB and 20"bikes, but did the chain get bent, too?
pics and specifics would be helpful, even if just in the "post game"followup
It would be good to have a follow up. Get the LBS to show you what they found
A derailleur straightener is a great tool , even just for checking alignment, an simple ebay ones are cheap.
and foldies are vulnerable to getting misaligned there.
bikebikebike is offline  
Likes For bikebikebike:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.