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Downtube folding bike

Old 08-30-06, 05:48 PM
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Does anyone know if the non suspended fork will swap over to the VIIIH bike?
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Old 09-06-06, 10:37 AM
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New VIIIH owner here. I just got the bike last week, and I'm very pleased so far. I looked at Dahons and Bike Fridays, but the DT is by far the better deal.

I'm no tekkie by any stretch, but after only a few rides, I have the same minor gripes to report as others: grips could use an upgrade, shifter is a bit stiff, and the gearing is too tall for me (and yes, part of the problem is that I am WAY out of shape ). That said, my gripes are minor, and far outweighed by the positives.

Some questions for the group:

My sensitive *ahem* "undercarriage" needs all the help it can get. I'm thinking of installing either a Thudbuster or Schwalbe Big Apple tires, at least in the (unsuspended) rear. Has anybody done either mod? If somebody replaced the tire(s), which size (or sizes, if you used different tires front and rear) Big Apple did you install? The Big Apples come in two diameters, 2.00 and 2.35. I'm thinking 2.35 might be too much even for the rear rim (current Kenda is 1.75), but would appreciate feedback from others. Do the BA's really make a difference in the ride over the Kendas?

Any suggestions for replacement grips?

Finally, dumb newbie question: Is the saddle adjustable front-to-back? Right now my riding position seems a couple of inches too far rearward. It didn't look like the saddle is mounted on a sliding track, but maybe I'm missing something.
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Old 09-06-06, 10:48 AM
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Originally Posted by rastro
Finally, dumb newbie question: Is the saddle adjustable front-to-back? Right now my riding position seems a couple of inches too far rearward. It didn't look like the saddle is mounted on a sliding track, but maybe I'm missing something.
If it is a regular saddle (I think it is), then you can open the bolt on the seatpost, that holds the saddle in place and slide it somewhat forward and back. The saddle rails are basically what you call "sliding track". Hope this helps.
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Old 09-06-06, 12:35 PM
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here is my mini mod:
https://www2.snapfish.com/slideshow/A...29/t_=72194129
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Old 09-06-06, 01:06 PM
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cranky, are those moustache bars?
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Old 09-06-06, 01:23 PM
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This is my first folding bicycle, and I have been following this forum for a long time to help me make up my decision as to what I needed. I already have a couple of great road and touring bikes, but I wanted something that I could fold up small for airline and train travel. I am 6" tall and about 175 pounds, so I took a gamble when I bought the mini, knowing that it is a bike that was made for women and people of smaller stature. I figured that I could build it up to fit my riding position, and create an adequit touring bike for my travels. So did I create a monster? Well, the mini actually handles very well and feels quite solid. The confidance I felt from the stability of the bike encouraged me to try riding it with no hands about 30 seconds after my first pedal strokes. The steering definately is more responsive, and I felt like I had to be more cautious riding in gravel. I can really blast down hills with it, and feel comfortable standing out of the saddle. I spent a weekend pulling about 35 pounds of weight in my BOB trailer just to see how it handled. I ended up riding up to Washington Pass, and completing a 60 mile roundtrip with the bicycle to see if it would hold up to my future tours. I must say that I was impressed with how comfortable I felt, although the mini felt a little whippy on fast descent with the BOB. I think that a large part of this is due to the long gooseneck of the trailer that is made for larger bikes. Modifying this by cutting it shorter like Chop did on his Ibex and Yak would probably give the bike with trailer a much better ride. As far as the "wheelie" feeling that one might expect from being so high on the bike, this was negated when I put my hand positions in the dropbar position. Somehow, I intuitively knew that this would be the case, so I chose to get dirt drops so that my hands and body would be comfy in the drop position most of the time. The gears are just about perfect as far as climbing is concerned, and I really like how the low gear is in direct drive and is most effecient, because this is where I want it most. I understand that this bike is for smaller people, but I really wish that it had come with an adjustable stem like all of the other DTs. I bought a Dahon adjusting stem that feels far less solid than DT's, but that was my only solution at the time, and it'll have to work for now. Hopefully, Yan will offer stem options someday for those who want to add a robust DT adj. stem. I also have had problems with my SA shifter. The face plate cracked and broke mysteriously within minutes of riding it, and my rear hub has been slipping around in the 6th and 7th gears. I ordered another for around $30 with shipping, and I would recommend having an extra on hand for those who are taking this bike traveling. My other gripe is with the rear suspension. It probably is fine for all the small riders out there who would buy this bike and never think to add their own suspension. However, with the myriad of sprung seats, cush tyres, and suspension seat posts, I think it is better to leave the frame simple, and allow the rider to add their own. As is, the rear triangle bobs up and down as I am riding, especially when I am in low gear. It is a little frustrating because there is no easy solution for "locking" it out, and this bike would have been fine with Big Apples and sprung Brooks of Thudbuster. All in all, this bike is a winner, and I feel like I made a wise decision to fix it up for some extended travels..........
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Old 09-06-06, 01:24 PM
  #557  
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Originally Posted by maunakea
cranky, are those moustache bars?
no, dirt drops, specifically Midge bars
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Old 09-06-06, 01:33 PM
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Originally Posted by invisiblehand
You can pick up another shifter for $24 at Bikeman.com

https://www.bikemannetwork.com/biking/p/LD2201

The Capreo is enticing, but with such a small wheel my guess is that a derailer would prove troublesome. Let's hope that a new shifter cures the hub's problems.
I've got the Capreo on my Mezzo - no probs on 16" wheels so far. Very small and neatly designed. Can't see how would be any less effective on the DT mini.
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Old 09-06-06, 02:57 PM
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Many (most) short cage RDs will handle 26T, the largest in the Capreo cassette. Getting rid of cage length gets rid of most of the issue ... but there is always the "trail crash on the right side" that will wipe the RD and bend the hanger. You can infer how I know.
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Old 09-06-06, 04:27 PM
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Originally Posted by rastro
I'm thinking of installing either a Thudbuster or Schwalbe Big Apple tires, at least in the (unsuspended) rear. Has anybody done either mod? If somebody replaced the tire(s), which size (or sizes, if you used different tires front and rear) Big Apple did you install? The Big Apples come in two diameters, 2.00 and 2.35.
AFAIK the Thudbuster is a complete seatpost/shock assembly in conventional diameters and lengths. I suspect your bike will need a much longer SP than anything in the Thudbuster lineup. That said, I think the worst way to try and build in some cushioning is to go for oversized tires. You think your bike is geared too high now? What do you think your regular cruising gear is going to feel like with the added rolling resistance from 2" tires even if they are road slicks? Nope, you've got to think inside the box this time and figure out a solution that won't create another problem. Myself I am holding out for the fully suspended Downtube. You might try to do the same. If I can eat the price of a nearly new Giant 1/2way to get into a FS 2006 Downtube I don't think you can lose selling the VIII cheap and getting The FS. Maybe Yan will work with you. Maybe someone somewhere can weld a shock absorbing seatpost onto an extension. Good luck.

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Old 09-06-06, 08:00 PM
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You can easily make your own Thudbuster telescoping seatpost like I did on my mod mini by cutting your original, adding a slot with a small hole at the end, and finally a seatpost clamp.
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Old 09-06-06, 08:01 PM
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Otherwise, you can order the Dahon specific Thudbuster.
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Old 09-06-06, 08:22 PM
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https://www.bikeforums.net/showthread...ght=thudbuster
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Old 09-07-06, 05:43 PM
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thanks maunakea. I had forgot who it was that posted this great solution months ago.
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Old 09-07-06, 09:59 PM
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DireWolf33 - i sent an email to Yan in regards to swapping the non suspended fork over to the viiih, and he suggested against it. He said that it would change the geometry of the bike.
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Old 09-09-06, 09:12 AM
  #566  
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I just received my DT IXFrontSuspension and it's great. I had the LBS take give it a once over and he noticed the rear derailleur was bent, I called up DT and they have sent a new one just like that. I have added my own bike lights since I'll be commuting in NYC and have white lightening'ed the chain. I also reversed the front post so it folds in between now as was suggested. I also upgraded the pedals to MKS FD-2's in order to allow for toe clips, I actually got powergrips because of their compactability (the pedals are a little wider folded, but with toe clip ability I'm okay with it). You can also take a couple links out of the chain to keep around in case of any future problems. Finally, I just ordered Schwalbe Marathon 2006 tires (you can keep the same 1.5 Front 1.75 Back config this way) and Airlock tubes from Specialized since my commute goes through a series of auto repair shops in Queens.

The ride of the bike is great, I feel little to nothing with the Front Suspension.

Only two things I would warn people about. 1) is the free bag, I already caused a seam to rip on it while zipping up (I was pulling to make the zipper lines closer to zip and rip...). Anyway, it's a free bag, so I just put the duct tape on and off I went. Being free, it's clearly not going to be a high quality double stitched mountainsmith type bag. 2) is the lower cog wheel on the rear derailleur. The bolt that keeps it in is not fixed by any nut, only by the single thread on the inner arms bolt hole. I suggest getting a longer bolt and utilizing a nut on it. It may also help prevent some wobble in that lower cog wheel since it is plastic and the spacers are just inexpensive aluminum. I wonder why Juju doesn't use a cast wheel cog?
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Old 09-14-06, 01:23 PM
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Yan,
did you see the pics of your bike?
https://www.bikeforums.net/folding-bikes/227696-can-you-tour-folder.html
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Old 09-14-06, 03:11 PM
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Originally Posted by Crankypants
Yan,
did you see the pics of your bike?
https://www.bikeforums.net/showthread.php?t=227696
I did now......very cool pics

Thanks,
Yan
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Old 09-15-06, 11:00 AM
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Originally Posted by BigMacFU
I just received my DT IXFrontSuspension and it's great. ...
thanks for the post, big mac, i'm a manhattanite gettin ready to buy one of these IX-front's myself so I can commute 100 blocks to school. been lurking on the board for about a week, getting a feel for this folder, vicariously. yeeha! thanks for the reviews, everybody!

colin
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Old 09-15-06, 02:33 PM
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A few Downtube questions...

Why does Downtube only give the weights of the bikes without fenders, rack, kickstand, barends, even though many of the bikes come with them. Ok, fine, the bike weighs 24lbs without that stuff. How much with? Fess up!

Is it correct that for current models only the Mini and VIIIH are available with an internal hub? I'm surprised so many folders come wiht derailers, since damage to them seems so likely as to be inevitable.

The descriptions of the IX bikes say, "lighter than our VIII bike." Ok... then why is Downtube still making the VIII frame? I'd prefer to buy a bike with an internal hub instead of a derailer. At 6'3", 240lbs, I don't see myself riding a Mini, so why do I have to choose between the lighter frame of a IX or the internal hub of the VIII?

Why would the Mini be $50.00 more than the VIIIH? It seems the opposite should be true.

Why is the IX-NS (no suspension) $319, when the IX-FS (front suspension) is $299? It seems like the one without suspension should cost less, not more.
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Old 09-15-06, 02:35 PM
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If I remember correctly, the shipping weight on my DTVIII 2005 was under 35 lbs.... maybe around 32 lbs?

This included rack, fenders, kickstand, carrybag, box, packing materials.

If this helps you narrow down what bike you're looking for.
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Old 09-15-06, 04:01 PM
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Originally Posted by SoonerLater
A few Downtube questions...

Why does Downtube only give the weights of the bikes without fenders, rack, kickstand, barends, even though many of the bikes come with them. Ok, fine, the bike weighs 24lbs without that stuff. How much with? Fess up!

Is it correct that for current models only the Mini and VIIIH are available with an internal hub? I'm surprised so many folders come wiht derailers, since damage to them seems so likely as to be inevitable.

The descriptions of the IX bikes say, "lighter than our VIII bike." Ok... then why is Downtube still making the VIII frame? I'd prefer to buy a bike with an internal hub instead of a derailer. At 6'3", 240lbs, I don't see myself riding a Mini, so why do I have to choose between the lighter frame of a IX or the internal hub of the VIII?

Why would the Mini be $50.00 more than the VIIIH? It seems the opposite should be true.

Why is the IX-NS (no suspension) $319, when the IX-FS (front suspension) is $299? It seems like the one without suspension should cost less, not more.
FYI the IXNS costs $349, 8sp version is $319. The VIIIH has the same frame as the IX and early 2006 VIII models. The IX stands for 9speed VIII represents 8speed. The mini costs us $60 more than the VIIIH from the factory after taxes it costs us about $68 more. We try our hardest to keep prices low, eventhough they should be much higher. Additionally the alloy fork on the IXNS costs more than the suspension fork. If you shop around you will probably notice nearly noone specs alloy forks on their bikes, most are chromoly.

Thanks,
Yan
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Old 09-16-06, 03:25 AM
  #573  
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Woot! My IXNS should be coming any day now.....

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Old 09-17-06, 03:38 AM
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If you are interested a fully rebuilt DT FS, browse to https://www.bikeforums.net/folding-bikes/229066-mauna-kea-bike.html
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Old 09-17-06, 01:24 PM
  #575  
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Originally Posted by maunakea
If you are interested this rebuilt DT FS, browse to https://www.bikeforums.net/showthread.php?t=229066



Maunakea, you are indeed the Mod King. Loved your Frankenfolder! So, what does this bike weigh?
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