Which is better, mechanical Shimano Ultegra, or Di2 105? What should you do if you saddle keeps slipping? Can you use 11-speed chainrings on a 12 speed groupset? Alex and Ollie are back, once again answering these burning tech related questions and more!

Chapters:
0:00 - Intro
0:15 - What do I do to stop my saddle sliding?
1:36 - Old Ultegra Di2 vs new 105 Di2
2:39 - Can I swap Shimano and Sram parts?
4:00 - Do I need a bigger rear cassette or a bigger front chainring?
5:20 - What is the optimal wheel setup for hills?
7:30 - How accurate are wheel on trainers?
9:03 - Do 11 speed cranksets work on 12 speed gearsets?

Useful Links:
Adventure Documentaries, Exclusive Shows & Live Racing on GCN+: https://gcn.eu/plus
Download the GCN App for free: https://gcn.eu/app
Visit the GCN Shop: https://gcn.eu/gcnshop
Join the GCN Club: https://www.gcnclub.com/

Have any burning tech related questions? Let us know in the comments below using #AskGCNTech and we'll get back to you in a future video!

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Photos: © Velo Collection (TDW) / Getty Images & © Bettiniphoto / http://www.bettiniphoto.net/

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