You don't need to be an 'investor' to invest in Singletrack: 6 days left: 95% of target - Find out more
I have a port on my seat tube for a dropper post, but I either run a standard seatpost or a non-remote seatpost. I've had bits of tape covering it, considered Sugru, and more lately, left it open but suspect quite a lot of water is getting in there and sitting in my bottom bracket (there is a drain hole but its small)
I can't find much in the way of bungs, I'm sure its a standard size but its a hand built frame so can't just get them from the manufacturer.
Its lozenge shaped (oval with straight sides) measuring 20mm * 8.5mm. I've found a few bungs that look correct (Ragley for example) but after doing a bit of digging it sounds like these are a tad longer at 22mm.
Anyone know a seller that has a range of sizes and can actually be bothered to give some sizes!
i'll have a look in our spares tomorrow, probably got something there that'll fit the bill.
I've had a bit of duct tape covering the hole in my Pact frame from new. 3 years or so. The same bit of tape.
Thanks guys, if Coatesy doesn't have anything, I do some scraps of invisiframe lying around somewhere so that would be a more permanent solution 🙂 I've got the grommet with a cable port in it but it falls out!
[img] 
[/img]
YUp, gaffer tape does the job 🙂
What about a cable sized bung to plug the hole in the grommet? Would probably stop it falling out.
I use to have an on-one dee dar. Had the same problem and bought these that fitted perfectly;
https://www.chainreactioncycles.com/ragley-internal-cable-guide-3pk/rp-prod180333
Sadly the only picture I have is this from when I sold the bike. Looks a good match?
Just buy the sugru because it really does do the trick. I’ve gone for axs mech so had open holes on my frame and as sceptical as I was it was easy and looks professional.
Whyte do these:
https://whyte.bike/products/cable-routing-grommets?variant=14599485980730
Not sure if the 25mm is overall length or hole length. Either way, if it's a few mm too long, you could probably hack the plug away a bit whilst still leaving a neat finish on the front.
Had no luck, all the ones we have are 25mm long.