[CR] Threads on Tigra

(Example: Framebuilders:Cecil Behringer)

From: "jim abt" <jamesabt@charter.net>
To: <Classicrendezvous@bikelist.org>
Date: Sun, 18 Apr 2010 08:00:40 -0500
Subject: [CR] Threads on Tigra

Hi all: I have a Tigra bike made in Switzerland that has a serious tight bottom bracket bearing cup on the drive side. The thing really needs to come out because the overhaul is absolutely necassary. The model year is a 1977 I beleive and the model name is Professional. The serial # is 121017 stamped on the bottom of the shell and there is a #60 stamped on the nondrive side as well as a #46 stamped on the drive side on the bottom of the shell. The bottom bracket is a Shimano and the cup is marked with the 35 x P1 and there is an "A1" also stamped on it. I have been cranking on this sucker assuming that it should be a Swiss thread since it is manufactured there. But what a dumbass I could be after finding out that it could very well be French threaded and I should be going in the other direction (counterclokwise) to remove it. The cup is on tighter than tight to begin with now after I could have been forcing the wrong direction it is even tighter yet, I am afraid.

I have been trying to find out from the archives without any luck what direction I should have the leverage on. I need your help. I have experience removing these but I am so use to the Japanese models with ISO threads that I feel slightly retarded when it comes to the various Euro models. Why could they not be standard?!! I do not need any help in how to other than that. Thanks

Jim Abt
Wausau, Wi. USA