Changing from Sora to 105.
How can you tell if your Giant defy stock rear wheel will take the upgrade from Sora to 105. If it can't do I need a new wheel or is there another fix?
Top 25 Contributor
The key to your speed compatibility is that you must wed 11-speed with 11-speed, 10-speed with 10-speed, 9-speed with 9-speed [the Sora system]. There are exceptions in the Di2 drivetrain where the Shifters of the 10-speed will 'talk' perfectly with any of the other Di2 components. This is because the Shifters are simply buttons which do not 'care' what gear you are in, they just direct up or down. It is the Rear Derailleur that 'knows' the gearing.
However, you do not have Di2 so this is not an issue for you.
Your wheelset will be an issue. You will need an 11-speed compatible freehub when installing an 11-speed Groupset, a 10-speed compatible freehub when installing an 10-speed Groupset and a 9-speed compatible freehub when installing a 9-speed Groupset.
So you CAN upgrade but you will have to upgrade your rear wheel to accommodate the 105 11-speed drivetrain.
Wiggle's price is superb. Enjoy.
3 weeks, 1 day ago
Adelaide SA, Australia