Once you’ve invested in a road bike, the next natural course of action is to equip it with the right gear. Correct walking can change the feel and function of the bike. Shimano Tiagra and Shimano 105 are still among the main competitors for inexpensive road bike equipment. But which group is better? In this article, we look at the Shimano Tiagra Vs. 105 groupsets to decide which one is the best.
The major 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. As well as, the 105 groupset uses components that weigh less than the Tiagra making them more suitable for competitive bikes.
Shimano Tiagra Vs. 105
105 have an 11-speed sprocket compared to the Shimano Tiagra 10-speed system sprocket.
The construction quality of the 105 handle saves almost 300 g in weight compared to the Shimano Tiagra groupset. Although the threaded model is quite a bit heavier than the 105 one (above) in percentage terms, you’re still only taking 15g, and that’s negligible considering the overall weight of your bike.
The group sets Tiagra and 105 offer excellent hydraulic disc brakes. If you choose rim brakes, the 105 offers superior performance thanks to the Dual Pivot SLR-EV design. According to cycling weekly, the R7000 generation 105 is so similar to Ultegra in performance that the only thing counting against it anymore is that the name doesn’t have the same ‘cool factor.’
The most obvious difference between 105 and Shimano Tiagra is the number of sprockets in the rear derailleurs. Tiagra uses a 10-step cassette instead of a 105-step 11-step cassette. 105 are available in options 11-25, 11-32, and 12-25. Tiagra is available in box options 11-25, 12-28, 11-32, and 11-34. It sounds complicated, but these numbers tell the number of teeth in the box. The smaller of the two, the first number represents the smallest size of the pinion, and the second, the largest number, and represents the number of teeth in the large pinion. The optional Shimano 105 speed allows the rider to find the most efficient and ideal cadence for their endeavors.
Although the 105 and Tiagra gears use the same nickel-plated steel sprocket, the Shimano 105 gears are significantly lighter despite a sprocket. Must tight the bike chain also match the number of sprockets. One hundred five chains rings are designed for 11 speeds, not 10 speeds. They are narrower and, therefore, a little lighter than the Tiagra chainset.
Rear derailleur though there was no visible difference between the 105 and Tiagra rear derailleurs in the past, newer versions of the 105 groups is set to use known as the shadow rear derailleur.
This technology was developed to reduce damage to the rear derailleur in an accident, as a crooked rear derailleur is one of the main causes of poor gear changes. The rear derailleur 105 also looks more compact than the Tiagra but can still carry a 30-ton box.
The cranks look the same, but 105 cranks significantly reduce the hidden weight compared to the Tiagra. The uneven spacing of the four crossbars on both cranks improves strength and rigidity for efficient energy transfer.
The 105 and Tiagra cranks are available in crank lengths of 165 mm, 170 mm, 172.5 mm, and 175 mm. 105 comes with a very short crank length of 160 mm. Shorter cranks are more popular with commercial pilots because they offer tangible aerodynamic and physiological benefits.
In the end, the right size is what gives you the most comfortable position on the bike for your riding style. The Tiagra double crank is available in teeth 52-36 and 50-34. The 105 cranks also have the option of 53-39 teeth for racing. The Tiagra group has a triple-front crank option (50-39-30) compared to the compact model of the 105.
Triple cranks are no longer as popular as they used to be due to their weight and maintenance, but they provide additional equipment for steep ramps. Because of this, they are still popular with electric bikes.
The differences between the Tiagra and 105 gradually emerge in the brakes lever, especially among purists who prefer rim brakes over disc brakes. Group 105 uses the same Dual Pivot SLR-EV rim brakes as the premium Shimano Ultegra and Dura-Ace group sets. This means more equal braking forces on each shoulder, which leads to better modulation and braking force. The rim brakes in the Tiagra group set offer reasonably acceptable braking performance, but the 105 brakes are not safe. Replacing the entire brake pad on the Tiagra rim with cartridge pads brings immediate improvements.
According to Shimano, the 105 and Tiagra brakes are suitable for bikes up to 28mm wide, although many riders have successfully fitted the 30mm wheels with 105 brakes. The price differential tends to reflect throughout the full bike, as one equipped with 105 is likely to be slightly higher ‘specced’ in terms of wheels and other finishing gear. Given the trend in road cycling towards wider tires for comfort and performance, this option with the Tiagra and 105 is a great way to protect your bike from the future.
You can even open the door for fun walks on the gravel. As you’d expect in groupsets designed for riders who value performance, the 105 and Tiagra groupsets come with hydraulic disc brakes. Shimano disc brakes offer excellent and consistent performance across the range. Disc brakes offer greater modulation and braking power compared to rim brakes, especially on wet roads.
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Shifters and levers
Shimano or STI (Full Shimano Integration) switches are ideal for the entire product range. Tiagra and 105 groupsets use dual levers, which mean the levers control both gear selection and the brakes.
If you have a budget of $2,000 -$2,000/ €1,500- €1,700, then you’re likely to see 105 gearings installed on a good quality carbon frame with wheels and finishing components of a similar level. The main difference in dual control between groups is that the Tiagra has 10 speeds, and 105 has 11 speeds.
The Tiagra STI switch is also compatible with the triple system, while the Switch 105 only works with the dual system. In both groups, the cables are laid under the belt to make the cabin clearer. This has long been the standard for 105 groups, but even more budget groups like Tiagra have seen this aesthetic improvement. Equipped with hydraulic disc brakes the 105 double steering gear is much more compact and improved than the Tiagra.
The 105 switches are also available in small sizes, a game-changer for drivers with small hands. In both versions, the TSI levers are ergonomic and precise. The Tiagra levers and the 105 TSI have a simple overhang adjustment screw under the housings.
Shimano Tiagra Groupset
This groupset guarantees better ergonomics and usefulness. Updates and changes have been made over the years that promise to improve every time. In terms of hierarchy, Shimano Tiagra is a level 4 group. This group also offers double star kits but is best known for its high-quality triple chains. The suggested price for a complete Shimano Tiagra groupset (sets of chains, hijackers, deflectors, chain, gears, brakes, lower support) is £ 500 or £ 450 on which dealer you believe.
- This group offers reliability and durability at an affordable price.
- The brakes and range are commendable.
- It has a premium look.
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Shimano Tiagra vs. 105: FAQs
Is Tiagra Enough?
Tiagra is good enough for about 97% of road bike owners.
Is Shimano Tiagra Better Than Ultegra?
Tiagra is equal to 105 minus one gear. The only performance improvement Ultegra has made over the 105 / Tiagra is the new 6700 crank arm. The forged outer ring and forward movement are more accurate. The rear circuit is very, very similar.
Is Shimano Tiagra
Tiagra is the Shimano level 4 groupset and is classified under Dura-Ace, Ultegra, and 105. Shimano showcases its best and newest features first in Dura-Ace, and then these advances permeate all tracks.
Shimano groupsets deserve their excellent reputation amongst cyclists. Riders benefit from decades of trickle-down from the pro riders, and that translates into great value components. It is possible to upgrade the 105 groupsets with premium Ultegra or Dura-Ace components down the line, which may be a selling point for many riders.
Every rider has to work within their budget, which will ultimately determine which groupset is best for you. You won’t be let down with either the 105 or Tiagra groupsets.