Having built up my Gazelle with a modern Shimano 105 groupset I don't like how the chainset looks. Its just too chunky looking for the bike. Trying to find a replacement for a nice cheap price is proving tricky but Chain Reaction have a Truvativ Rouleur thats fits the bill but in 172.5mm only. Now I know there's a load of conflicting info out there but in reality will I really notice that much of a difference between 170 and 172.5?