Once you invest in a road bike, the next natural course of action is to equip it with proper gear. The right gear can change the very feel and function of your bike. The Shimano Tiagra and the Shimano 105 continue to be among the top contenders for investment-worthy road bike gear. But which is the better groupset? Before we get down to the nitty-gritty of the Shimano Tiagra vs. 105 debate, let's take a quick detour and cover the basics.
Shimano has six different groupsets; Tiagra and 105 fall under them.
A groupset encompasses a manufacturer's collection (Shimano, in this case) of a bike's mechanical parts. Each groupset includes brakes, shifters, bottom brackets, chainsets, derailleurs, cassettes, and bikes chains.
You can opt to use parts of the same groupset or mix and match parts from different groupsets. But that is not what we are here for, so let's get down to the topic at hand. Which is the superior groupset? Is it the Shimano Tiagra or the Shimano 105?
Shimano Tiagra Versus 105 Comparison
Here's a quick overview of both before we jump into the main comparative points:
Overview of the Shimano Tiagra Groupset
This groupset promises improved ergonomics and functionality. It has undergone updates and changes over the years, vowing to be better each time around. In terms of hierarchy, Shimano Tiagra makes up the fourth-tier groupset.
This groupset offers double chainsets too, but it is more famously known for its high-grade triple chainsets.
Pros
Cons
Overview of the Shimano 105 Groupset
The 105 takes a comfortable third spot on Shimano's hierarchy of road groupsets. Often, when riders think about getting gear from this groupset, they consider it an upgrade. And this is justifiable given that the Shimano 105 groupset boasts good looks and offers a good value for money. However, the 105 groupset only offers double chainsets.
The 105 groupset is also lighter than the Tiagra groupset; if that's a detail, you're particular about.
Pros
Cons
Mechanical Details
The dual control levers in Tiagra are a 10-speed system, while they are an 11-speed system in the 105. The bracket in both groupsets is made from glass fiber reinforced plastic (GFRP). Their main levers are aluminum.
The 105 groupset's gear shifting feels light while the Tiagra is a bit heavier. The former perfectly captures the snappy lever action of the Dura-Ace and Ultegra groupsets, which is great.
The cables in the Tiagra groupset are placed under the handlebar's tape, much like gears in the brand's high-end groupsets. This way, you get a taste of high-end gear on a relatively budget-friendly groupset.
Braking Performance
The 105 groupset brakes we liked on Amazon uses the SLR-EV dual-pivot braking system. This design helps equalize braking forces on each arm, so you have better power and control. When riding, you can slow down your bike with minimum pressure to the lever.
Brakes in the updated Tiagra groupset offer more stopping ability as compared to before, but the 105 groupset still takes the cake in this area. Tiagra groupset brakes perform well when you make a sudden stop, but they come a little short in terms of feedback and feel through the levers.
If you have a compatible fork and frame, you can enjoy the direct mount option that the 105 groupset offers. The Tiagra groupset does not extend this option.
Tire Capacities
Both Tiagra and 105 have the ability to handle tires that are up to 28 mm wide. The most recent version of brakes from the 105 groupset display more drop by a slight margin. This means that you can run 30 mm tires with them as long as you use the right frame.
Disc Brakes
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The 105 groupset features 11-speed disc brakes while the Tiagra groupset has 10-speed disc brakes. The recent 105 R7000 STI units appear to be more streamlined than their predecessors, or even the Tiagra ones for that matter.
The hydraulic discs in Tiagra continue to deliver consistently good performance across different versions. Tiagra brakes fitted to the Genesis Datum 10 significantly improved its performance on downhill terrains.
Chainsets
Tiagra chainsets weight about 910 g while 105 chainsets weigh up to 716 g. The crank arms in both groups' chainsets are made of aluminum, with their axle being made of steel. The use of the four-arm spider design and uneven spacing between the arms ensures that there is stiffness and strength where they are needed.
Both groupsets offer crank lengths of 165 mm, 170 mm, 172.5 mm, and 175 mm. You can also opt for a 160 mm crankset from the 105 groupsets.
When it comes to chainring options, the 105 groupset lets you choose from 50-34, 53-39, and 52-36 tooth setup. The Tiagra groupset may not offer the traditional 53-39 tooth setup option, which is needed for racing bikes. But it boasts a 50-39-30 (triple chainset) configuration. For this, you will require an additional front derailleur and a left-hand shifter, which is compatible with such configurations.
The 105 chainset is lighter than the Tiagra, but you can set up a 105 chainset in a Tiagra-gear bike if you wish to do so.
Front Derailleurs
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The front derailleurs in both groupsets are made using the same materials. One of the major differences between the two is that the Tiagra is 10-speed compatible and calls for a large chainring that is between 46 and 52 teeth. The 105 groupset, on the other hand, is meant for 11-speed use and goes with a chainring with 46 to 53 teeth. You'll have to check out front derailleurs from the Dura-Ace groupset if you want 53 teeth and larger chainrings.
The appearance of the front derailleurs for the 105 and Tiagra are very different. The 105 ones follow a design idea that the brand calls 'compact toggle design.' The Tiagra front derailleurs are known to shift smoothly and with minimal noise even when under pressure.
Rear Derailleurs
The updated rear derailleurs of the 105 groupsets incorporate the brand's shadow design. Shimano originally created this design for their mountain bikes. Under this design, the derailleur is tucked into the bike so as to increase its sprocket. The revamped Tiagra derailleurs offer long-lasting and precise performance.
The derailleurs in both groupsets are available in short and long cage versions to be used with different cassettes. Short-cage Tiagra derailleurs can handle at least a 28-tooth large socket, while the 105 can take on up to a 30-tooth sprocket.
In the long-cage versions, both groupsets can handle a 34-tooth sprocket, with the 105 R7000 groupset being able to shift to a 40-tooth chainring with ease.
Cassettes
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The cassettes for both groupsets have nickel-plated steel sprockets. The 105 version goes a step further with its anodized aluminum lockring and spider arm. The 105 version is available in 11-25, 12-25, 11-34, and 11-32 tooth options. At the same time, the Tiagra offers 12-28, 11-34, 11-25, and 11-32 tooth options.
The 105 groupset's cassettes are especially beloved for their resistance to wear and tear.
Chains
The chain is lighter and narrower in the 105 groupsets than in the Tiagra groupset. One of the chief reasons being that the 105 is an 11-speed while the Tiagra is a 10-speed. The chains in both Tiagra and 105 feature Sil-Tec (PTFE) coating, which equips them to run quietly.
Bottom Brackets
Weight-wise, the bottom bracket in the Tiagra is 92 g, with the 105 version weighing 77 g – not a significantly major difference.
Pedals
The Shimano 105 groupset features pedals which boast a lovely low profile. You can lean these pedals up to 31 degrees.
Pricing
A quick skimming of gears in these groupsets indicates that the 105 is more expensive than the Tiagra. But it would be unfair to say that the Shimano 105 groupset is superior to the Shimano Tiagra because it is pricier. It would also be unfair to say that the Shimano Tiagra is better than the Shimano 105 because it is the more considerate of your wallet's contents. The gears in these two groupsets come with features that are completely their own. So, you pay for the features and not the products, with these groupsets.
What's the difference between Shimano Tiagra vs 105 Groupsets?
The main differences between the Shimano Tiagra vs 105 groupsets is that the Tiagra uses a 10 speed setup while the Shimano 105 has 11 for better gear ratios. Moreover, the 105 groupset uses components that weigh less than the Tiagra making them more suitable for competitive bikes. Another difference between the 105 and Tiagra is that bicycles using the Tiagra components are often always cheaper. However, there isn't much in the price of their standalone components.
The Final Verdict
The Tiagra groupset equips your bike with everything it needs to be a reliable mid-level road bike. But if your heart is set on an 11-speed, the 105 is the better choice for you. Also, if you have a Tiagra-gear bike, it may be challenging to upgrade to a 105 because that will demand a lot of change in your bike's components. With 105-gear bikes, you can gradually swap components with the Dura Ace or Ultegra groupsets.
Performance and design, the 105 is undeniably the superior groupset. But the Tiagra offers just as good a performance at a lesser cost.
FAQ
How does the Shimano Tiagra groupset compare to the Shimano 105 groupset?
The Shimano 105 groupset is generally considered to be the better option compared to the Shimano Tiagra groupset. The 105 is an 11-speed system, while the Tiagra is a 10-speed system, which gives the 105 more gearing options. The 105 also has better braking performance and a lighter weight than the Tiagra. However, the Tiagra is more affordable and offers good reliability and durability.
Is it worth upgrading from the Shimano Tiagra groupset to the Shimano 105 groupset?
It depends on your personal preferences and budget. If you're happy with the performance of your bike with the Tiagra groupset and don't have the extra money to spend on an upgrade, then it may not be worth it. However, if you're looking to improve the overall performance of your bike and have the budget for it, then upgrading to the Shimano 105 groupset could be a good investment.
How do the brakes on the Shimano Tiagra groupset compare to those on the Shimano 105 groupset?
The brakes on the Shimano 105 groupset are generally considered to be better than those on the Shimano Tiagra groupset. The 105 uses the SLR-EV dual-pivot braking system, which helps to equalize braking forces on each arm, resulting in better power and control. The Tiagra brakes perform well in sudden stops, but they may not provide as much feedback and feel through the levers as the 105 brakes do.
How do the rear derailleurs on the Shimano Tiagra and 105 groupsets compare?
Both the Shimano Tiagra and 105 groupsets offer reliable and durable rear derailleurs. However, the 105 rear derailleur may have a slightly smoother and more precise shifting performance due to its 11-speed system.
Can the Shimano Tiagra groupset be used with hydraulic disc brakes?
Yes, the Shimano Tiagra groupset is compatible with hydraulic disc brakes. In fact, the Shimano Tiagra groupset offers a complete set of components for a hydraulic disc brake setup, including the levers, calipers, and rotors.
What is included in a complete Shimano Tiagra groupset?
A complete Shimano Tiagra groupset typically includes the following components: brake levers, brake calipers, shifters, front and rear derailleurs, bottom bracket, chainset, cassette, and chain.
How do the gears on a Shimano Tiagra groupset compare to those on a Shimano 105 groupset?
The Shimano 105 groupset has an 11-speed system, while the Shimano Tiagra has a 10-speed system. This means that the 105 has one more gear than the Tiagra, which can give it an advantage in terms of the range of gear ratios available. However, both groupsets offer reliable and durable gears that are suitable for road cycling.
Can the Shimano Tiagra groupset be used on a good quality carbon frame?
Yes, the Shimano Tiagra groupset can be used on a good quality carbon frame. In fact, the Tiagra groupset is suitable for use on any road bike, regardless of the frame material.
Does the Shimano Tiagra groupset offer electronic shifting?
No, the Shimano Tiagra groupset does not offer electronic shifting. Electronic shifting is a feature that is typically only found on higher-end groupsets such as Dura Ace and Ultegra.
How does the Shimano Tiagra groupset compare to higher-end groupsets like Ultegra or Dura Ace?
The Shimano Tiagra groupset is a lower-tier groupset compared to Ultegra and Dura Ace. It is generally considered to be less expensive and slightly lower quality than these higher-end groupsets. However, the Tiagra groupset is still a reliable and durable choice for road cycling and offers good performance at a more budget-friendly price.
Can the Shimano Tiagra groupset be used as a upgrade for a bike that currently has a lower-tier Shimano groupset?
Yes, the Shimano Tiagra groupset can be used as an upgrade for a bike that currently has a lower-tier Shimano groupset like the Claris. It is a step up in terms of performance and quality compared to lower-tier groupsets and can help to improve the overall performance of your bike.
What is the weight of a complete Shimano Tiagra groupset?
The weight of a complete Shimano Tiagra groupset can vary depending on the specific components included. However, it is generally lighter than a complete Shimano 105 groupset.
Can the Shimano Tiagra groupset be used with a triple chainset?
Yes, the Shimano Tiagra groupset is famously known for its high-grade triple chainsets. A triple chainset is a type of chainset that has three chainrings, providing a wide range of gear ratios for road cycling.
How do the brake levers on the Shimano Tiagra groupset compare to those on the Shimano 105 groupset?
Both the Shimano Tiagra and 105 groupsets offer reliable and durable brake levers. However, the brake levers on the 105 groupset may provide a slightly better braking performance due to the SLR-EV dual-pivot braking system used in the 105 groupset.
Can the Shimano Tiagra groupset be used on a bike that is intended for use with the higher-end Dura Ace and Ultegra groupsets?
Yes, the Shimano Tiagra groupset can be used on a bike that is intended for use with the higher-end Dura Ace and Ultegra groupsets. While the Tiagra is a lower-tier groupset, it is still a reliable and durable choice for road cycling and can offer good performance on any road bike.
Last Updated on October 14, 2023 by Daniel White