Is this Dahon Speed pro TT Safe?
#1
Newbie
Thread Starter
Join Date: Oct 2023
Posts: 1
Likes: 0
Liked 0 Times
in
0 Posts
Is this Dahon Speed pro TT Safe?
I recently came across an offer for a second-hand folding bike starting at $400 on eBay. The seller mentioned "The frame was repaired and the weld didn’t come out as clean but it’s solid." Wondering if it's really solid, how could I check? Thanks in advance!!!
#2
Senior Member
Hard pass. A welded & repaired folder frame - especially an amateur repair - is not worth risking damage to precious body parts if that repair fails while you're riding it.
I'm amazed the seller put this up for sale at all. Tremendous liability if something goes south, as it well could long after the sale.
I'm amazed the seller put this up for sale at all. Tremendous liability if something goes south, as it well could long after the sale.
#5
Palmer
Join Date: Mar 2007
Location: Parts Unknown
Posts: 8,737
Bikes: Mike Melton custom, Alex Moulton AM, Dahon Curl
Liked 1,933 Times
in
1,113 Posts
To be fair to the seller, they are not selling this as a rider:
"Sold as is for parts or restore."
"Sold as is for parts or restore."
Likes For tcs:
#6
Senior Member
Repaired steel frame?
maybe
Repaired aluminum frame, repaired by a top notch welder with NO flaws?
possibly
Repaired aluminum folding frame with dodgy weld of unknown skill
Negative. That your 3 strikes.
maybe
Repaired aluminum frame, repaired by a top notch welder with NO flaws?
possibly
Repaired aluminum folding frame with dodgy weld of unknown skill
Negative. That your 3 strikes.
#7
Senior Member
Join Date: Aug 2014
Location: UK
Posts: 766
Bikes: Dahon Jetstream p8 (sold), customized Dahon Helios x10, customzed Dahon Smooth Hound x11,customized Dahon Hammerhead 8.0 d7, Planet X Free Ranger (mullet setup 1x11), Planet X Giovanissimi 20 (1x9), Frog 52 (1x9) and Frog 48 1s
Liked 253 Times
in
183 Posts
$400 might be little expensive considering a good one would be ~$500/600 depending for condition.
If you could get get if for a lot less money, it might be worth having it as a donor to upgrade a second entry model bike or even fit everything on the FHON frame.
Edit, Note that some of the TT steerer posts were under recall due to cracking failure (2008/2009 I believe) so worth checking.
If you could get get if for a lot less money, it might be worth having it as a donor to upgrade a second entry model bike or even fit everything on the FHON frame.
Edit, Note that some of the TT steerer posts were under recall due to cracking failure (2008/2009 I believe) so worth checking.
#8
Clark W. Griswold
Join Date: Mar 2014
Location: ,location, location
Posts: 14,324
Bikes: Foundry Chilkoot Ti W/Ultegra Di2, Salsa Timberjack Ti, Cinelli Mash Work RandoCross Fun Time Machine, 1x9 XT Parts Hybrid, Co-Motion Cascadia, Specialized Langster, Phil Wood Apple VeloXS Frame (w/DA 7400), R+M Supercharger2 Rohloff, Habanero Ti 26
Liked 4,378 Times
in
2,923 Posts
That is a hard pass, don't buy someone else's bodged repair, maybe it is OK but probably not and the risk is not worth it. I wouldn't ride it if the guy paid me.
#9
I agree with all saying pass. Additional info: If repair was due to a crash, pass. If frame was cracked due to fatigue (normal wear and tear), that is a high-stress area and welding will affect the surrounding metal due to heat, making it weaker. I had a Dahon Speed frame (I think same 4130 chrome moly steel) that cracked, I debated about a fix that would have involved adding gussets to reduce the stress there, but it still would have been dodgy, as probably would distort the seat tube enough to prevent the seatpost from sliding. I just found another used Dahon. (I kept the old frame and fork to use as wheel truing jigs, mounted in a Workmate-style table.) Just curious, where is the crack/repair; On the forward side of the seat tube just above the monobeam?
#10
Newbie
Join Date: Jan 2024
Posts: 2
Likes: 0
Liked 0 Times
in
0 Posts