When choosing between Shimano 105 Di2 and Ultegra Di2, one of the most common questions is about weight. After all, every gram matters if you climb often, race, or simply want the lightest possible setup. So, how much heavier is 105 Di2 compared to Ultegra Di2—and does it really affect your ride?
Weight Difference Between 105 Di2 and Ultegra Di2
The Shimano 105 Di2 groupset is roughly 250–300 grams heavier than Ultegra Di2. While both share the same electronic shifting technology, the weight savings in Ultegra come from higher-end materials like carbon and titanium, whereas 105 relies more on aluminum and steel.
Does the Extra Weight Matter?
For most recreational riders, the difference is small—about the weight of a full water bottle. You’ll still enjoy smooth, precise electronic shifting either way. But for competitive cyclists, those 250–300 grams can make a noticeable impact on long climbs or race-day acceleration.
Performance Beyond Weight
- Shifting: Both groupsets deliver the same crisp, reliable Di2 shifting.
- Braking: Ultegra brakes manage heat better, which is helpful on long descents.
- Durability: Ultegra components tend to last longer due to higher-grade materials.
Who Should Choose 105 Di2?
If you want the best value in electronic shifting without overspending, 105 Di2 is an excellent choice. It’s perfect for endurance riders, weekend cyclists, and those upgrading from mechanical drivetrains.
Who Should Choose Ultegra Di2?
If you race, climb frequently, or simply want a lighter, more premium setup, Ultegra Di2 justifies the higher cost. It saves weight, improves long-term durability, and gives you that extra edge in performance.
Bottom Line
Shimano 105 Di2 is about 250–300 grams heavier than Ultegra Di2. For many riders, the difference won’t matter. But if you’re chasing every possible advantage, Ultegra’s weight savings and premium feel are worth the upgrade.
FAQs
1. Is the weight difference noticeable on climbs?
Yes, but only for performance-focused riders. Recreational cyclists may not feel much difference, while racers and climbers often prefer the lighter Ultegra setup.
2. Do 105 Di2 and Ultegra Di2 shift differently?
No. Both use the same Di2 electronic shifting system, so gear changes feel nearly identical.
3. Is Ultegra worth the extra money over 105 Di2?
If you value weight savings, durability, and higher-end finishes, yes. If your main goal is electronic shifting at a lower cost, 105 Di2 offers excellent value.
