I can understand 'Maggots' concerns over the cost with our present PMR set. But there are much cheaper sets out there on the market that do an adequate job. We have tried several sets in the past but some haven't quite stood up to the rigors of touring, the current TTI sets were bought for their quality and reliability and they have indeed proved very good and reliable. It is often a case of you get what you pay for!
When the roads are quiet we do often ride alongside each other and chat without the radios. But when there is traffic on the roads it is safer to ride one behind the other. As others have mentioned it is difficult for the person in front to then chat without having to try and turn their heads and shout, that's when the radios come into their own.
IMO 'just4fun' is quite sensible in thinking about using radios to chat to each other. It must surely be much safer as you can chat away riding in single file rather than as I have seen with some club rides where people were chatting away riding sometimes three a breast or weaving up and down the group to get in on the latest bit of banter!
Yes there is a limited range to the PMR's, but we very rarely get that far away from each other. Also where we were cycling in Iceland last year the mobile network coverage was very patchy and for most of the time the phones were useless. Once you have bought the radios there is no further cost where as with the mobile phones there are the call costs and if you are touring abroad that would work out expensive.
Even with radios you have to get your radio procedures correct. It was quite funny as on one occaision in Denmark we were riding one behind the other and my wife said over the radio "can we stop". Unfortunately she didn't wait for a reply and promptly slammed the brakes on. I was a litle bit closer than I should have been and didn't have time to brake I slammed into the back of her, my front wheel jammed in between her rack and back wheel and I summersaulted over the handlebars. After what was probably a flying twist with pike ended up flat on my back in front of her exclaiming "you could had waited for an answer before slamming on the brakes" with the reply "you shouldn't ride so close" and then both laughed at my bike neatly parked behind hers!
