DynaTech Seatpost Diameter [twin stay rear version]

[chaser]

Pls can anyone tell me the seatpost dia/size on the MT3,4,5 Dynatech frame?

This is the later frame, not the one with the mono stay.

Is it 27.0?

Cheers,

Chaser.

 

[Stick Legs]

I belive that these are 26.6mm Very odd size and I have had a devils own job over the years to get them.

Cheers.

 

[Andy R]

I belive that these are 26.6mm Very odd size and I have had a devils own job over the years to get them.

Cheers.

Thomson Elite ?

 

[chaser]

Thanks for reply guys.

26.6! Maybe a smaller post /shim is the way to go?

What do you think?

I will also ask Sinnett what shim he used with his USE post.

Ride and Smile

Chaser.

 

[Piers]

RooX (http://stores.ebay.co.uk/gueser66 for their EBay store) do 26.6 in silver (second page of their section). I got a black S4 recently and the people answering e-mail were nice.
The design is unchanged over the past 9+ years and they are strong and very long.


BTW, my M-Trax 4000 (not a mono-stay) is 27.2 but came with a 27.0 post (cretins assembling it).

 

[chaser]

Thanks Piers,

Roox looks really nice

Does it suffer the same problem as USE post, being the same sort of design? [the pin migrates to the rear, leaving the front clamp bolt up against the post bod]

Cheers,

Chaser.

 

[Piers]

Just checked my mew bike, the pin doesn't seem to have moved backwards at all in about 300 miles of off-road use.
My old one (S2 pictured below), on my Pace, was set up very close to the post so I can't really say if it moved at all. That post has thousands of miles on it and no problems - even the anodizing looks fresh.
The RooX posts are chunkier than the USE, more like the original Syncros, and they have an insertion callibration anodized up the back which is smart. No stickers to peel or paint to flake.
The pix are of a 7 year old post in a hard-used MTB; not bad condition considering.

 

[chaser]

Thanks for pic Piers. I think I prefer it over a USE.

I think I will order one of those ASAP

I was gutted that I could not use the NOS Syncros I just bought for my 1990 Dyna - I can really see where Thomson got their deign from.

Cheers,

Chaser.

 

[Piers]

You're welcome Chaser.
Post a pic of the bike when you're done building it up. If you don't mind. A couple of friends had Dyna-Techs BITD - brown (bronze?) lugs and Ti tubes with DX kit.

 

[chaser]

Hi Piers,

I have done one Dyna already. You can see it in Readers Bikes up to '97

http://www.retrobike.co.uk/forum/viewtopic.php?t=48850

Now I am doing an 1992 MT3 Titanium - should be a lot lighter than the 1990 first gen one [it weighs 26 lbs] as the frame and fork alone will be over 1lb lighter.

I am also having some really light Campag Alpha XL with DT Rev' spokes wheels built onto NOS XT rear hub and NOS XC pro front.

I will use a titanium BB this time too.... TA still do a 122mm!

Rest of the spec will be pretty much the same as the 1990 one.

I will post pics soon.

Thanks for your interest in this project.

Cheers,

Chaser.