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Author Topic: Never seen this shock before?  (Read 2960 times)

Spokes

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Never seen this shock before?
« on: May 02, 2012, 12:25:36 am »
http://www.ebay.ca/itm/ws/eBayISAPI.dll?ViewItem&item=261011847244&clk_rvr_id=338272020599

It says its a GDT shock but that yellow elastomer looks huge?  It looks more like a plastic dust cover over the elastomer but why? ???

Chris
4000
857
856's
OZx modern build
757
4500
957
955
5000
no room in big shed but always room for one more!

Colin

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Re: Never seen this shock before?
« Reply #1 on: May 02, 2012, 04:49:00 am »
Not just ODD but WRONG! WRONG! WRONG!

a) GDT's don't fit Crosslinks, only Vectors, e.g. Beast GDT & 657
b) a GDT is 190mm long, a Crosslink needs an NR-x series shock which is 205mm long.
c) GDT's had springs not MCU's
d) never seen a MCU like that on any PRO~FLEX. Yes, maybe it's a cover for a spring?

quote:
GDT shocks
         The GDT shock ("Girvin Damping Technology") is a shock that was offered as an Original Equipment item on our 1996  and 1997 bicycles. It uses a similar technology to the Noleen shocks, but does not include an adjustable washer stack or any external adjustments. The GDT, however, utilizes a floating piston and performs well because of this feature. This shock was designed by Girvin engineers to be used on most of our 1997 lineup, but with the late-season purchase of Noleen, was spec'd on only a few bicycles and will not be sold as an aftermarket item.


Very, very, very possibly, this is a "hybrid" fork manufacturer produced with a correct length GDT, but I don't think so, if you look in the side on shot the lower link looks too compressed, i.e. the shock is too short.

I have sent a message to the seller advising him of the danger of using a wrong length shock and asking about the yellow thingie...............

Col.
« Last Edit: May 02, 2012, 05:05:12 am by Colin »
2001 OzM
2000 OzX
1999 x500
1999 900 Frame
1998 4000se
1998 4000
1997 957 Frame
1997 857 Frames
1997 XP-X (856)
1995/6 x55/x56 Frame
1992 962 Frame
1991 Marin Pine Mountain with a Flex Stem

w2zero

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Re: Never seen this shock before?
« Reply #2 on: May 02, 2012, 10:00:26 am »
Yes the yellow bellows thingie is a cover.  You can see the wire ties in the side view and the front view shows the two air/water drain holes. 
855
856 Beast 1
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856 Animal (small)
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fyrstormer

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Re: Never seen this shock before?
« Reply #3 on: May 02, 2012, 12:35:45 pm »
Meh. The GDT is junk anyway, by the standards of any real shock absorbers. I realize there was a ramp-up that was necessary to build a market for high-quality shock absorbers on bikes, but the fact is, the technology used in modern bike shocks has been used in automobiles and motorcycles for decades. Now that we've at least got shock absorbers that don't use 1920's technology, there is absolutely no reason to go back.

Get a coilover or an air shock. Leave the rubber springs behind.

Spokes

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Re: Never seen this shock before?
« Reply #4 on: May 02, 2012, 01:22:07 pm »
ha ha I like Cols technical terminology 'the yellow thingie'. I new it was wrong! ;D

Chris
4000
857
856's
OZx modern build
757
4500
957
955
5000
no room in big shed but always room for one more!