I am lost, and may be in over my head. I have a 2008 Specialized Roubaix Expert Rival Compact. I am due for an new cassette/chain and chainring. I figured I would save a few bucks and order the parts online. I wrote down the exact model number, and all info off the crankset, and ordered what I thought was the best deal from Jensen USA.
This is what I ordered: http://www.jensonusa.com/Sram-Rival-...k-175mm-34X50T
Received it today and this is what it looks like: http://www.backcountry.com/sram-riva...NDExMDAwMDEzNA
Are there two versions of a SRAM Rival compact crankset? Or is my older version less open? I am not a total weight weenie, but this thing looks heavy compared to what I own now.
I apparently need a bottom bracket lesson too. Specialized has several published bulletins stating that a 42mm alloy OSBB Shell is what the bottom bracket is supposed to be. The bottom bracket that came with this says GXP on it just like the crank arm (new one and existing) but does not look like what is on the bike right now? Do I need to order a different bottom bracket.
I am pretty competent with truing wheels, chains, cassettes, tires, stems, but I have never done a BB before. From the videos on line, it looks fairly easy, but I just want to make sure I have all the right stuff before I start.
Thanks in advance.