I bought the complete 'new style' Stronglight Impact chainset and I don't know what rings are fitted - I am impressed with it though - very good value. I use a cheap but effective Shimano UN55 bottom bracket with it.
I got Spa's own crank
TD-2 for £20 I already had two inner rings 26 & 28 the 28 from their cheaper chainset with 28/38/48 for £35 when I first started, and two zircal the 38 and 50th rings, I think the rings are pretty much the same as the Stronglight ones
Stronglight outer rings
Spa's branded rings
they shift pretty well, many a time as well as the rear, I set the bike up when I got the 105 shifters with 50/38/26 and a 12-27, one out of curisoty to see if it would work on the 5703 FD and I wanted a gearing I could spin with and climb, however I found I hardly used the 38x27 combination, so when I changed the cassette last weekend (through choice not wear its still in pretty good shape after nearly 4,000 miles), I went with an CS6700 12-23 I am finding this much better, coupled with the 28th inner, as the drop in gears on the rear was too great really from the 38th to 26th, I had to shift down the cassette about 4 gears
I am contemplating getting a Tiagra 12-30 cassette and stripping it for the 19-21-24 gears, as you can't split the 105 or Ultegra low gears, and putting a 39 ring on, changing my current middle range from 43.8-83.9" to 43.1-86.1, and overall from 32.3-110.4" to 30.9-110.4", don't you just love triples and the options you have
