Originally Posted by
Steve B.
If buying new ?, why would you buy 10 when 11 has been the standard and is a much refined group. The front derailer was redesigned for the 105 5800 series, was a HUGE improvement and we are now up to the 7000 series. It's a really great group at a great price for performance. Only and BIG question is if you are using vintage wheels, will they accept an 11 spd. cassette ?
The 5800 front derailleur has that long arm which interferes with a lot of tires and is finicky as all getout to set up from scratch.
What was that an improvement from?...the 5700 worked fine.
The 5800 was replaced by the 5801 which is an actual improvement as the long arm was removed which improves tire clearance and the JIS screws were replaced with hex bolts.