kingbrillo
Retro Newbie
I have started building up a kona explosif 1992 frameset gold colour. Does anyone know the correct diameter of setpost for this frame? i have fitted a 27.2 but it does seem a very tight fit is it 27.0 or 26.8?
kona explosif 1992 seatpost size
- Thread starter kingbrillo
- Start date
Hi,
I just went through the same with my 93 Explosif, there's a topic on it a week ago. I got replies for 27.0 and others 27.2mm. When the frame arrived and I tried the 27.2 it did go in but tight.
So, I'm opting to stick to 27.2 as it is not a long insertion for my build and I have some nice posts in 27.2. If I had a long insertion I'd probably try a 27.0 for size. Alternative is a a 25.0 USE post with a 27.2 sleeve. The sleeve has a minimum but sufficient depth and allows a long post to fit through without risk of it getting jammed.
Enjoy!!
I just went through the same with my 93 Explosif, there's a topic on it a week ago. I got replies for 27.0 and others 27.2mm. When the frame arrived and I tried the 27.2 it did go in but tight.
So, I'm opting to stick to 27.2 as it is not a long insertion for my build and I have some nice posts in 27.2. If I had a long insertion I'd probably try a 27.0 for size. Alternative is a a 25.0 USE post with a 27.2 sleeve. The sleeve has a minimum but sufficient depth and allows a long post to fit through without risk of it getting jammed.
Enjoy!!
old school pete
Senior Retro Guru
Mine's a 27.0
The seat tube is a 28.6 with 0.6 gauge, so that leaves 27.4. Kona recommend a 27.0 post and that will fit easily, sometimes too easily. I have two Kilaueas and two Explosifs and they all take a 27.2 quite happily, so that's what I use.
I also have a 97 Lava Dome for which Kona also recommend a 27.0 post and that will not take a 27.2 and 27.0 is decently tight. How so? Well the 28.6 seat tube on the Lava Dome has a 0.7 gauge, leaving 27.2, that's how so. A 27.0 post is as tight in a Lava Dome as a 27.2 is in a Kilauea or Explosif.
So why do Kona recommend the same size of seatpost for frames of different gauge? To save twopence I should imagine. A 27.0 is ok, as others have said, and the more posts you order of the same size, the less the unit cost will be.
I would agree with Paul about a 26.8. Over-clamping puts an undue stress on the tube and can lead to a crack starting from the slot.
I also have a 97 Lava Dome for which Kona also recommend a 27.0 post and that will not take a 27.2 and 27.0 is decently tight. How so? Well the 28.6 seat tube on the Lava Dome has a 0.7 gauge, leaving 27.2, that's how so. A 27.0 post is as tight in a Lava Dome as a 27.2 is in a Kilauea or Explosif.
So why do Kona recommend the same size of seatpost for frames of different gauge? To save twopence I should imagine. A 27.0 is ok, as others have said, and the more posts you order of the same size, the less the unit cost will be.
I would agree with Paul about a 26.8. Over-clamping puts an undue stress on the tube and can lead to a crack starting from the slot.
