So taking advice from http://www.bikeforums.net/bicycle-mechanics/911109-simplex-prestige-derailleur-adjustment-idiots-needed.html I gave up and resorted to using a Suntour V-Luxe parallelogram derailleur....which was fitted to the Allin when I was time-trialling.
Ok, so I persevered with the Simplex Prestige gear, but to no avail! Yes it changed gear ok, but it just didn't take up the chain slack. Checking the spec sheet on http://www.disraeligears.co.uk/Site/Simplex_Prestige_derailleur_%28637%29_-_instructions_%281st_style%29_scan_2.html the total capacity is 37 teeth, so accordingly with a 42T/52T chainwheel and 14 to 26T rear sprocket, this gives a range of 32 teeth....so it should have been ok. But it wasn't, I even shortened the chain and re-positioned the rear wheel in the drop out. No difference. So taking advice from http://www.bikeforums.net/bicycle-mechanics/911109-simplex-prestige-derailleur-adjustment-idiots-needed.html I gave up and resorted to using a Suntour V-Luxe parallelogram derailleur....which was fitted to the Allin when I was time-trialling. So I found the original gear in the garage, stripped it down, de-greased it gave it a polish and oiled the jockey wheels and it came up like new. Not bad for over 40 years old! So does it work? Yes! The gear screws in to the gear hanger fine but needs a thin washer to clamp down securely.....(.another trip to the garage) I had to lengthen the outer cable as the entry point was in a different position to the Simplex, but luckily I had plenty left over...and it was an excuse to use my new Park Tools cable cutters I got for my birthday! The gears work fine up and down the sprocket and between the chainrings and to be honest looks better than the Simplex. After final tightening and checking and a shake-down ride, the cables will be cut to length and a ferrule crimped over the ends to keep things neat and tidy.
2 Comments
Ian
1/5/2015 03:23:38 am
I've got the identical rear mech if you need a spare...
Reply
phil
1/5/2015 06:41:38 pm
Thanks Ian. I need the washer that goes between the mech and the frame...hopefully I'll find one in the garage!
Reply
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AuthorI have been riding bikes since I was 11 years old and used to race my Allin in time trials back in the early 1970's. CategoriesArchives
January 2016
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