Originally Posted by
Unknown Cyclist
The OP hasn't said if it's single or fixed.
Materials have improved as well (as flexibility), modern 3/32" chains are made from better materials with higher tensile strengths and so are (fairly obviously) stronger.
Given that no derailleur system in the last 50 years has used 1/8" chain, I'd say it's a pretty safe bet that he won't be using a derailleur. Maybe an internally geared hub, but that wouldn't obviate my point.
Flexibility is only an advantage with a derailleur system, not fixed/SS or internal gearing. And modern 1/8" chains are made from the same materials as modern 3/32" chain -- just wider rollers.