Welcome to the
ISIS Overdrive web site.
Please visit the Tooling page on this web site for information regarding tooling suppliers.
1) The thread is a larger diameter than normal BSA threaded shells and therefore it will require more force to cut the threads.
2) There will potentially be more distortion during the welding process due to the larger shell diameter. Whenever possible threads should be cut after welding and heat treatment in a single fixture.
3) The thread pitch is different between the BSA shell and ISIS Overdrive. Therefore tapping machines will need to be reconfigured for the different thread pitch.
4) As always, thorough pre-production planning and samples runs are suggested prior to production.
How do I mount a chainguide onto an
By the time ISIS Overdrive bicycles hit the market we expect that both frame mounted and BB mounted chainguides will be available for ISIS Overdrive frames. Please see the following question for more information regarding frame mounts.
Is there an
As of August,
2003, no, although there are a number of companies discussing the details of
such a standard. There is a meeting to be held at Interbike
If I have an
No. You can purchase adapters from various sources to size an ISIS Overdrive frame down to the normal BSA size. In this respect the ISIS Overdrive standard is backwards compatible with existing BSA bottom brackets.
What kind of spindle should I use in an
Whatever spindle you
would like. The ISIS Overdrive standard is as applicable to tapered square
spindles as it is to
Again, it is up to you. Bearings for the bottom bracket may take any number of forms, including custom cartridge bearings, needle bearings, bushings, or loose balls. The purpose of this standard is not to standardize one particular bottom bracket design, but rather to standardize the interface between the bottom bracket and frame. It is up to the individual designer to determine the type and configuration of bearings in the bottom bracket.
No, although the use of a Shimano XTR tool or Truvativ X-Tool cup interface is preferred to maintain compatibility with existing tools. However, the bottom bracket designer may use any type of tool interface they choose.
Should I grease the bottom bracket cups and/or the frame prior to installing the BB?
Please follow the bottom bracket manufacturer’s suggestions.
Not that we know of.
Not that we know of. However, we do not guarantee this to be the case in any way. It is up to the individual manufacturer to perform their own legal research and protect themselves from any legal repercussions of using the interface.
Yep, use it to your heart’s content.