Kona Explosif 1995 Help with colour to go for page 5

Just tried the 27.0 and it goes in fine pretty sure it will clamp up fine
 
My 97 Cinder Cone has a 27.0 post but my old 95 Cinder Cone had a USE post in a 27.2 shim. I remember the 27.2 being a little tight because the top part of the seatube was pinched in a bit (that or its the internal butting of the tube). My gut feeling is that a 27.2 should fit any of the mid 90's steel Konas if the top part of the seatube is opened up a little.
 
There is no reason why Konas with different seat tubes should all take the same size post.

A 97 Cinder Cone seat tube has a 0.7mm wall thickness, so it isn't going to be able to take a 27.2 post unless it has been over-reamed (which is not unheard of).

The 95 Explosif actually uses a Columbus Max seat tube I believe, the only Kona ever to use that tube. The 96 and 97 Explosifs used round Columbus seat tubes, perhaps because low-band mechs were on their way (or maybe Columbus had run out of Max seat tubes, wouldn't surprise me). Either way, it was a 0.9/0.6/1.3 tube, the butting to 1.3 being external, hence the ED rising from 28.6 to 30.0. 28.6 less twice 0.6 = 27.4, so a 27.0 will fit easily and a 27.2 may fit.

Kona fitted 27.0 posts as standard, but sometimes they take some serious clamping to make them stay put in a 0.6 tube. Using copperslip rather than grease may help.
 
Cool thanks anthony so will a 27.0 seat post and 30 seat clamp be ideal??
 
There is no reason why Konas with different seat tubes should all take the same size post.

No but there seems to be a grey area as to what the actual size is with people being able to run 27.2 posts on frames that apparently are supposed to take 27.0 posts. From what I have read on here time and time again there is some uncertainty in most cases.
 
Seatpost size

Oh Dear! I've been running a 26.8 in my '93 Lava Dome 'cos that's what fitted it. It's never slipped even with my 90+ kg bouncing on it. Sorry to add to the confusion.
 
Re: Seatpost size

shedobits":e6po7wzj said:
Oh Dear! I've been running a 26.8 in my '93 Lava Dome 'cos that's what fitted it. It's never slipped even with my 90+ kg bouncing on it. Sorry to add to the confusion.

Irritating isn't it :LOL:

My 1992 Explosif is 27.0mm and 1992 Cinder Cone is 26.4mm from memory. 2001 Lava Dome is 27.2 as is I think the 1988 Cinder Cone.

Think we need a RetroBike table of Kona seatpost sizes for different years/models :p

Who's volunteering for that then ? :D
 

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