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Refurbing Greenspeed GT3
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nashd View Drop Down
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Points: 14 		Post Options Post Options   Thanks (0) Thanks(0)   Quote nashd Quote  Post ReplyReply Direct Link To This Post Posted: 11 October 2024 at 11:45am
Thanks very much, LWaB.

I can't see a problem with anything else.  I had wondered if the handlebar pivot had been knocked around, but I'm not sure if that's possible.

I think I'll strip off the tie rods, clean and lubricate the tie rod ends and threads etc, try to straighten the obviously bent tie rod, reassemble, then try to adjust toe-in.

I'd like to ride the trike before making a decision on whether or not it's worth doing a full refurb including powder coating.

There seem to be a few other issues including a worn wheel bearing, and some movement which is felt at the rim.  Initially I wondered if that might be caused by the worn bearing, but now think there's play somewhere else - maybe in the backing plate or kingpin.
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garryb59 View Drop Down
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Points: 243 		Post Options Post Options   Thanks (0) Thanks(0)   Quote garryb59 Quote  Post ReplyReply Direct Link To This Post Posted: 12 October 2024 at 2:18pm
[logging in again after some time]

If this was my bike [and that's important because not everybody would be happy with the following procedure] what I would do is:

1. Renew the hinge pivot bolt if possible
2. Get a sacrificial quick release bolt [or any M8 bolt will do]
3. Rub down one surface [not sure which one I'd choose from here] of the hinge to remove all the paint, and score/make rough with something [possibly even some very light lines with an angle grinder]
4. Put some brown packing tape over the other surface...very carefully and precisely
5. Then get some carbon fibre, lay it inside the hinge [Goldilocks Style - not too much not too little....although less is better because you can always add more later]. It might be difficult to prevent epoxy getting onto the bolt [ hence sacrificial]....and be careful to keep it away from the hinge bolt, but plenty of grease should sort that out.
6. Then do the hinge up real tight. To go belt and braces - take the seat off and get a laser on the frame when you do it to keep it all aligned properly.
7. Leave to cure and open up!

You should be able to eliminate all the play so the surfaces seat real snug against each other.

Yes......it's a bodge, but a high class bodge I would say :-)
I certainly wouldn't hesitate if it were my bike and was getting those kind of issues.


Edited by garryb59 - 12 October 2024 at 2:24pm
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LWaB View Drop Down
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Points: 277 		Post Options Post Options   Thanks (0) Thanks(0)   Quote LWaB Quote  Post ReplyReply Direct Link To This Post Posted: 28 December 2024 at 6:18pm
I got the hinge pivot pin replaced with an oversized pin and the hinge bored out for tight clearance. The hinge works nicely now with no detectable play.

The next improvement to replace the Sturmey 3x9 hybrid hub gear with a triple crank and a standard hub with an 11-28t or 11-32t 9sp cassette. The Young Lady doesn’t get on with the hub gear’s twist grip and she dislikes the hub gear’s weight and drag. I will replace the Sunrace R90 rear derailleur with a Shimano Altus for its high capacity but short cage. It works fine on a 9sp 9-28t cassette on her Micro.

What is a recommended front derailleur for 58/44/30t chainrings?

Edited by LWaB - 28 December 2024 at 6:19pm
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LWaB View Drop Down
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Points: 277 		Post Options Post Options   Thanks (0) Thanks(0)   Quote LWaB Quote  Post ReplyReply Direct Link To This Post Posted: 04 January 2025 at 6:20pm
I will try an old 7sp Deore LX front mech that predates the Microdrive era, pinched from my Frezoni road bike. Hopefully it can cope with the big ring without grinding the outer cage for clearance.

Another question. The GT3 came with a proprietary rear rack but missing the proprietary bolt-on bracket that would allow a 2-bolt dyno taillight to be fitted to the normal flat plate.

I could bodge something but is the correct piece available as a spare part? I’ve not seen it advertised anywhere.


Edited by LWaB - 04 January 2025 at 6:21pm
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NigelSlee View Drop Down
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Points: 161 		Post Options Post Options   Thanks (0) Thanks(0)   Quote NigelSlee Quote  Post ReplyReply Direct Link To This Post Posted: 22 March 2025 at 2:20pm
Originally posted by LWaB LWaB wrote:

I have ordered some PTFE tubing from China, 15mm OD and 13mm ID. These dimensions seem to match the chain tubing supplied by Ginkgo. We will see how it works.

I have a couple of bikes needing new chain tubing so interested in your findings with the PTFE tube from China.

To all: any other suggestions?


Edited by NigelSlee - 22 March 2025 at 2:21pm
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LWaB View Drop Down
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Points: 277 		Post Options Post Options   Thanks (0) Thanks(0)   Quote LWaB Quote  Post ReplyReply Direct Link To This Post Posted: 23 September 2025 at 1:04pm
Much-delayed response:
The eBay chain tubing arrived fairly tightly coiled, requiring some time and application of a heat gun to straighten it enough for use. If I had my time over, I’d order another metre more than what I calculated. The PTFE chain tubes are a touch shorter than is ideal but quite a bit cheaper than PTFE chain tubing ordered from specialists. The cheapest option is PVC of course but PTFE supposedly reduces chain friction at a nominal environmental cost.
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LWaB View Drop Down
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Points: 277 		Post Options Post Options   Thanks (0) Thanks(0)   Quote LWaB Quote  Post ReplyReply Direct Link To This Post Posted: 23 September 2025 at 1:12pm
The GT3 refurb continues.

The old MTB front mech shifts fine up to the 58t chainring but we might have to increase that to something bigger as she is now overrunning the 58x11t top gear too often.

She is looking for the old style GT3 headrest that plugs into bith side tubes of the seatframe as the horizontal bar provides good mounting points for a bag and rear lights. The only available Greenspeed headrests rely on a single central support which provides none of those mounting points. The headrest is shown in http://www.wrhpv.com/greenspeed/gt3/pic/index.html Any ideas where to find one?

Also, I am working in Oz for a couple of weeks and have some room in my baggage. Let me know if you want some difficult-to-find tyres or recumbent spares ferried to Auld Blighty.


Edited by LWaB - 23 September 2025 at 1:15pm
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