Re: [CR]shimano crane?

Example: Racing

Date: Fri, 14 Oct 2005 15:35:52 -0500
From: John Thompson <>
Organization: The Crimson Permanent Assurance
To: classic list <>
Subject: Re: [CR]shimano crane?
References: <>
In-Reply-To: <> wrote:
> The top pivot in the Crane is sprung. My understanding is that is how
> they were able to use the slant parallelogram design while Suntour's
> patent was still valid.

The Crane isn't a slant parallelogram, just a drop-parallelogram. Shimano didn't start using a slant parallelogram until the Dura-Ace "SIS" in 1985, after the SunTour patent expired.


-John Thompson (
Appleton WI USA