If the mast extension is 30cm long or longer yes. 430 mast plus extension set to 30cm = 460 but the luff length most likely is more than 460 this is the measurement you need to consider because it may be something like 482 which means you would need the extension set to 52cm (482-430) and extensions aren't usually that long. So read what the luff length on the sail is and tell us how long your extension is and put it on here and someone will tell you if a 430 will work or not.

If it is a 48cm extension it is designed to work on 48cm and have enough in the mast. It will not weaken the mast.

However, 46cm of extension is very unlikely to work well as it effectively makes the mast softer. Main thing is it will twist off too easily.
If you are a lightweight it may work OK

i weigh about 75kg would this be alright

qldnacra said...
In theory the mast should actually work better as far as flexing goes with less extension inside it because if you you had that extension set at say 2cm it would have 46cm in the mast stopping that area from flexing. But like Mark says it may flex to much.

In practice, however, 48cm of mast extension remains 48cm of stiff mast, whether inside or out. A 4.0m mast with a 48cm extension set to 45cm will have a slightly different bend characteristic to a 4.3m mast with a shorter (30cm or less - I don't know how short they come) extension set to 15cm. Likewise, the same mast with a 48cm extension set to 15cm will bend differently to the same mast with a 30cm (or less - I don't know how short they come) extension set to 15cm. I must admit though, I can't see it making a whole lot difference for all we plebs.

how many times and ways you need this question answered?

slalomfreak said...

jezdog said...

so that means it should b aright then

.
Just try it,nothing to lose.

but before you buy it..........

no worries champ got the idea,just wanted to make sure, not all rich enough to buy lots of gear