I replaced the long cage Tiagra 4700 with a shortcage, and went for the 105 10 speed (5700) which you would think would be a straight swap... It's not. Admittedly, the Tiagra shifting isn't as light but it's forgivable considering the price difference.

Tiagra compatibility - Singletrack World Magazine New Tiagra compatibility - Singletrack World Magazine

Phase 2 paired a 9 spd Alivio MTB mech. with a 34 tooth cassette. Not really a success but that may have been down to a cable kink problem. When we reviewed Tiagra we said, “Shift feel is perhaps a little heavier than Dura-Ace or Ultegra, but that's an unfair criticism given the huge price difference.”If you need to make adjustments, on both levers this can be done using a screw-operated system. This is especially useful for those with a shorter reach or smaller hands are you are then able to move the levers to be closer to you. Welcome to the latest edition of road.cc’s comparison of Shimano's popular Tiagra and 105 groupsets. We've taken an in-depth look at the pros and cons of the two groups and listed the best-priced source of components that we can find. There is quite a bit of difference between the Tiagra and 105 groupsets when you look at the threaded options, certainly in percentages. In actual weight, we're only looking at 15 grams so it won't add much to your road bike. There is no need to upgrade the components at once. You can choose to upgrade to Ultegra or Dura-Ace as they need replacing.

Shimano HG50 9 Speed Cassette | Tredz Bikes Shimano HG50 9 Speed Cassette | Tredz Bikes

That said, for the tiny increment in typical price, the BB-R60 (105) is also used in the Ultegra groupset and has an excellent reputation for durability."Cycle to Work is a salary sacrifice scheme, where you can save up to 42% off a new Bike and Safety equipment. This means the cost is deducted from your salary as a non-cash benefit, so you save on tax and national insurance. Should you decide that you want to start with the 105 version, you will arguably have more options. Or at least, upgrading can be done more easily. Virtual cycling platform Rouvy is rolling out a significant update today, featuring a revamped UI/UX dashboard and enhancements to the core riding experience However, a triple chainset is only available with Tiagra so that is something Tiagra has over 105. Dual Pivot Brakes

Tiagra HG500 10 Speed Cassette | Wiggle Shimano Tiagra HG500 10 Speed Cassette | Wiggle

Cant say 100% for sure but generally speaking all Shimmy disc brakes are interchangable - even between road and mountain. So I'd say almost certainly. The only recommendation I have seen is to also swap out the road hose for the MTB hose if you want road brifters to MTB calipers. Even then I would guess they still work but you lose a little feel. Tiagra is offered with both a double chainset (there are two chainrings) and a triple chainset (there are three chainrings) whereas 105 comes as a double only.We found the Tiagra front derailleur to shift cleanly, smoothly and quietly, even under load. Rear derailleur The hoods are comfortable to perch on and the levers to use, and there’s a solid feel to the shifting and braking.

SHIMANO 10-Speed Road Cassette Sprocket | SHIMANO BIKE-EU

As both are Shimano parts, swapping them out can be done easily. Both chainsets use a 110mm bolt circle diameter.Then you have to factor in whether the shifting control levers have one additional position than that found in Tiagra groupsets. Shimano 105 Groupset Upgrades