The 105 groupset is the workhorse of the Shimano range, delivering strong performance at a sensible price. It's the mid-range groupset offered by the Japanese company, and it got a new look for 2019.
While the 105 weighs in higher on the scales than the range-topping Dura-Ace and second-in-line Ultegra groupsets, there's not so much to distinguish them in terms of pure performance.
Now, the modest pricing of the 105 has been slashed even lower, as Chain Reaction Cycles has cut a third of the RRP off both rim and disc versions of the groupset.
Shimano 105 R7000 groupset (rim) | 33% off at Chain Reaction Cycles
Was £595.99 | Now £399.99
This sturdy, high-performance groupset is perfect for race bikes and winter-steeds alike. At just £399.99, this road groupset is great for the rim-brake purists. View Deal
Shimano 105 R7020 groupset (disc) | 37% off at Chain Reaction Cycles
Was £799.99 | Now £499.99
If you think the future is disc brakes, the R7020 Shimano 105 disc groupset is now available with £300 off at Rutland Cycles. View Deal
Black Friday at Cyclingnews
Aside from the aesthetic upgrade for 2019, Shimano also re-designed the internal shifting mechanism for more precise, smoother shifts, while the rear derailleur features Shimano's Shadow technology, which smooths shifting performance and stabilises chain movement.
There are still plenty of options in stock, although, at such low prices, they're bound to be snapped up quickly.
The rim brake groupset has 11-28 and 11-32 cassettes and 50-34, 52-36 and 53-39 cranksets available. Meanwhile, you can choose from 11-28, 11-30 and 11-32 cassettes, plus 50-34 and 52-36 cranksets if you opt for the disc brake groupset. Both come with a choice of 170mm, 172.5mm or 175mm crank lengths.
Black Friday cycling deals from around the web:
Wiggle: Up to 60% off
Chain Reaction Cycles: Up to 50% off
BackCountry: USA Only - deals on Cervelo, Pinarello and more
Evans cycles: 40% off Cannondale
Tredz: Over £1million of savings per week
Rutland Cycling: Up to 50% off Liv, 45% off Giant
Ribble Cycles: Up to £500 off
Tweeks Cycles: Up to 96% off
Hargroves Cycles: At least £1000 off Pinarello
Cyclestore: Deals on bikes, clothing and accessories
Leisure Lakes: Discounts on Specialized, Trek and more
ProBikeKit: Clothing deals on Castelli
Jenson USA: Up to 91% off
Halfords: Half price Garmin
Amazon: Cheap Garmin and GoPro
Walmart: More cheap Garmin and GoPro deals
GoOutdoors: Double Discounts
Proviz: 20% off everything