These two bikes are quite the study in contrasts. The first one was purchased for a modest $6.25, while the second came in at $2.29, with an additional $0.55 spent on the Pro51 wheelset, bringing its total to $2.84. That makes the price difference more than double—a significant gap by any measure.
When it comes to weight, the complete bikes tip the scales at 7.0 and 8.0 kilograms respectively. These figures reflect contributions from the frame, components, handlebars, and most notably, the wheels. As a result, the S-Works feels perceptibly lighter in motion. The wheels play a pivotal role here; the CLX2 is far easier to get spinning compared to the Pro51, and it also boasts a longer cruising range. A solid review overall.
On the topic of groupsets, we have UT Di2 versus 105 mechanical. UT shines with its lightweight design, lightning-fast shifts, and a distinctly electronic feel. To be honest, though, I still lean toward the 105 mechanical. The speed of the shifts doesn’t impact my ride as much, so the simpler setup works just fine for me.
Interestingly, after switching to the integrated handlebar, I’ve found the riding position on the S-Works to be superior to that of the SL7. Could it be that the integrated bar is shorter or positioned lower? Despite this advantage, I’m not a fan of how flexible the integrated handlebar feels—it just doesn’t sit right with me.
Now here’s the dilemma: I don’t need two bikes cluttering my garage. So which one should I part ways with?
Maeve Stephens 
Adam Stone 
Elijah Perkins