Shimano Tiagra vs 105: Which Groupset Is Right for You?
Tiagra is Shimano's 10-speed mechanical workhorse, while 105 steps up to 11 and 12 speeds with Di2 options. Here is how they compare on shifting, weight, gearing, and price so you can pick the right groupset.
If you’re buying an entry-level road bike or planning your first drivetrain upgrade, the Shimano Tiagra and 105 groupsets sit right at the decision point: Tiagra is the dependable 10-speed workhorse, and 105 is the enthusiast-grade tier that unlocks more gears, less weight, and electronic shifting.
Both are excellent, and the gap between them is smaller than the price difference suggests. In this guide I’ll break down the technical differences, gearing, weight, price, and who each groupset is best suited for.
Quick Comparison: Tiagra 4700 vs 105
Tiagra 4700 is Shimano’s current 10-speed mechanical groupset, and it borrowed heavily from the previous-generation 105 5800: a 4-arm crank, under-bar-tape cable routing, and a similar hood shape. That trickle-down is exactly why Tiagra feels so close to 105 in everyday riding.
Shimano 105 now exists in two current forms. The 105 R7000 is an 11-speed mechanical groupset (rim or disc brake), and the newer 105 R7100 is a 12-speed electronic-only Di2 groupset (disc brake only). Which 105 you compare against matters, so this guide covers both.
Key specs at a glance:
- Tiagra 4700: 10-speed, mechanical only, rim or hydraulic disc brakes, ~2,900g (rim brake)
- 105 R7000: 11-speed, mechanical, rim or hydraulic disc brakes, ~2,550g (rim brake)
- 105 R7100 Di2: 12-speed, electronic shifting, disc brake only, ~2,950g complete
- Gear steps: 105 offers one or two extra sprockets, giving smaller jumps between gears
- Price: 105 typically costs 40 to 100 percent more than Tiagra depending on version
Key Technical Differences
1. Number of Gears
This is the headline difference. Tiagra 4700 is a 10-speed system, meaning up to 20 gear combinations with a double crankset. The 105 R7000 is 11-speed (up to 22 combinations), and the 105 R7100 Di2 is 12-speed (up to 24 combinations).
More sprockets do not extend your total gear range by much. What they do is fill in the range with smaller steps, so each shift feels more seamless and you can hold your ideal cadence more precisely.
Real-world impact: On rolling terrain or in a fast group, the tighter jumps of 105 help you stay in the sweet spot. For solo endurance riding and commuting, Tiagra’s 10 speeds are plenty.
2. Mechanical vs Electronic Shifting
Tiagra is mechanical only. There is no Di2 version, and there never has been. You shift with cables, and the feel is crisp and reliable.
The 105 R7000 is also mechanical, but the current-generation 105 R7100 is electronic Di2 only. If you want push-button electronic shifting at the enthusiast tier, 105 R7100 is your entry point into the Di2 ecosystem.
Real-world impact: Di2 delivers consistent, low-effort shifts and holds tune longer, but mechanical Tiagra and 105 R7000 are simpler to service and far cheaper to buy and repair.
3. Shifting Quality and Feel
Because Tiagra 4700 inherited so much technology from the older 105 5800, the two feel remarkably similar at the lever. Both use the same style of dual-control levers with cables routed under the bar tape for a clean cockpit.
Current 105 (both R7000 and R7100) refines shift action a step further, with slightly lighter lever effort and more precise indexing. The difference is noticeable side by side but rarely a dealbreaker on its own.
Real-world impact: New riders are unlikely to feel shortchanged by Tiagra. Riders upgrading from 105 or above may notice Tiagra’s action is a touch heavier.
4. Braking Options
Both groupsets are available with hydraulic disc brakes and are strong, controllable performers. Tiagra 4700 and 105 R7000 also offer rim brake (dual-pivot caliper) versions, which matters if you have an older rim-brake frame.
The 105 R7100 Di2 is disc brake only, so it is not an option for rim-brake frames.
Real-world impact: If you need rim brakes, choose Tiagra 4700 or 105 R7000. For disc bikes, all three are excellent.
5. Gearing and Cassette Range
Both groupsets offer wide, climbing-friendly gearing. Tiagra 4700 cassettes range up to 11-34T, and its cranksets include compact (50-34T), semi-compact (52-36T), and a very easy 48-34T option well suited to hilly endurance riding.
105 R7000 cassettes go up to 11-34T as well, and 105 R7100 offers 11-34T and 11-36T options on 12 speeds, giving even finer steps across a similar range.
Real-world impact: For climbing, Tiagra’s 48-34 crank plus an 11-34 cassette is genuinely low. 105 matches the range but splits it into smaller jumps.
6. Cross-Compatibility
The speeds are not interchangeable. Tiagra 10-speed shifters, derailleurs, cassettes, and chains are not cross-compatible with 105 11-speed or 12-speed parts, because the cable pull ratios, sprocket spacing, and chain widths differ.
That means you generally cannot upgrade piecemeal from Tiagra to 105. A full groupset swap is required to change tiers.
Real-world impact: Choose your target tier before buying, since mixing Tiagra and 105 drivetrain parts is not supported.
Weight Comparison
Approximate complete groupset weights (rim brake unless noted):
| Component | Tiagra 4700 | 105 R7000 | 105 R7100 Di2 (disc) |
|---|---|---|---|
| Speeds | 10 | 11 | 12 |
| Shifting | Mechanical | Mechanical | Electronic (Di2) |
| Crankset | ~785g | ~715g | ~754g |
| Cassette | ~280g | ~284g | ~361g |
| Complete (est.) | ~2,900g | ~2,550g | ~2,950g |
The mechanical 105 R7000 is the lightest of the three, roughly 300 to 350g lighter than Tiagra. The 105 R7100 Di2 carries battery and motor weight but adds an extra gear and electronic shifting. Across a whole bike, the Tiagra-to-105 difference is real but modest for most riders.
Price and Value
Pricing varies by retailer and brake type, but as a rough guide:
- Tiagra 4700 complete groupset: $500 to $650
- 105 R7000 complete groupset: $700 to $900
- 105 R7100 Di2 complete groupset: $1,000 to $1,200
Tiagra is the clear value pick. It delivers the large majority of 105’s performance for meaningfully less money, which is why it appears on so many endurance and entry-level road bikes. The step up to 105 buys you extra gears, lighter weight, and (with R7100) electronic shifting.
Who Should Choose Each Groupset?
Choose Shimano Tiagra 4700 If You:
- Are buying your first road bike or a value-focused endurance bike
- Ride mostly solo, commute, or tour
- Want reliable, easy-to-service mechanical shifting
- Prefer to spend less on the drivetrain and more elsewhere
- Need a rim-brake option on a budget
Tiagra is genuinely good. With trickle-down technology from older 105, it shifts crisply and holds up for years of hard use.
Choose Shimano 105 R7000 If You:
- Want 11-speed gearing with tighter jumps between gears
- Ride fast group rides or spirited solo efforts
- Want lighter weight without paying for electronics
- Still want a mechanical or rim-brake option
105 R7000 is the sweet spot for many enthusiasts: lighter and smoother than Tiagra, but simpler and cheaper than Di2.
Choose Shimano 105 R7100 Di2 If You:
- Want electronic shifting at the most affordable Di2 tier
- Ride a disc-brake bike
- Value 12-speed gearing and consistent, low-effort shifts
- Are happy to invest more upfront for long-term shifting quality
Upgrade Considerations
Upgrading from Tiagra to 105 is not a partial job. Because 10-speed and 11/12-speed parts are not cross-compatible, you cannot simply swap a shifter or cassette. A tier change means replacing the shifters, derailleurs, cassette, and chain together, and often the crankset too.
For that reason, it is usually smarter to buy the tier you want from the start rather than plan an incremental upgrade later.
Comparison Table
| Feature | Tiagra 4700 | 105 R7000 | 105 R7100 Di2 |
|---|---|---|---|
| Speeds | 10 | 11 | 12 |
| Shifting | Mechanical | Mechanical | Electronic (Di2) |
| Brake Options | Rim & disc | Rim & disc | Disc only |
| Max Cassette | 11-34T | 11-34T | 11-36T |
| Crank Options | 48-34, 50-34, 52-36 | 50-34, 52-36, 53-39 | 50-34, 52-36 |
| Weight (est.) | ~2,900g | ~2,550g | ~2,950g |
| Cross-compatible | No (10sp) | No (11sp) | No (12sp) |
| Price | $500–$650 | $700–$900 | $1,000–$1,200 |
| Best For | Value & touring | Enthusiast riders | Electronic shifting |
Shimano Tiagra vs 105 FAQ
It depends on how you ride. For fast group rides, spirited climbing, or anyone who wants electronic shifting, 105 is worth it for the extra gear, lighter weight, and smoother action. For commuting, touring, and value-focused riding, Tiagra delivers most of the performance for noticeably less money.
No. Tiagra is 10-speed and 105 is 11 or 12-speed, and the shifters, derailleurs, cassette, and chain are not cross-compatible across those speeds. Changing tiers requires replacing the drivetrain as a set, so it is best to choose your target groupset before buying.
No. Tiagra is mechanical only and has never had a Di2 version. If you want electronic shifting at an affordable tier, the 105 R7100 Di2 is the entry point into Shimano's Di2 ecosystem.
A complete Tiagra 4700 groupset is roughly 300 to 350g heavier than mechanical 105 R7000. Spread across a whole bike, most riders will not feel a dramatic difference, but climbers and weight-conscious riders may prefer 105.
Yes. Tiagra 4700 offers cassettes up to 11-34T and a very easy 48-34T crankset option, giving low gears well suited to steep and hilly terrain. 105 matches the range but with slightly tighter steps between gears.
It depends on your bike. The 105 R7000 is the direct mechanical comparison and is available with rim or disc brakes. The newer 105 R7100 is 12-speed electronic Di2 and disc only, so compare against it if you specifically want electronic shifting.
Tiagra 4700 and 105 R7000 both offer rim-brake caliper versions, so either works on a rim-brake frame. The 105 R7100 Di2 is disc brake only and cannot be used with rim brakes.
Not for most riding. Ten well-chosen gears cover the vast majority of terrain, and Tiagra shifts crisply thanks to technology inherited from older 105. The main practical gains from 105 are tighter gear steps, lighter weight, and the option of electronic shifting.
Bottom Line
Shimano Tiagra 4700 is the smart value choice. Its 10-speed mechanical drivetrain shifts reliably, offers climbing-friendly gearing, and comes in rim or disc versions. For first road bikes, commuters, and tourers, it is more than enough groupset.
Shimano 105 is the enthusiast step up. The mechanical R7000 adds an 11th gear and shaves weight, while the R7100 Di2 brings 12 speeds and electronic shifting at the most affordable Di2 tier. If you ride fast, chase marginal gains, or want push-button shifting, 105 earns its premium.
The core question is simple: choose Tiagra if value and simplicity matter most, and choose 105 if you want extra gears, less weight, or electronic shifting. Just remember the two tiers are not cross-compatible, so pick the one you want from the start.
