As the nights draw to their longest, rain hammers against my window and icy drafts sneak into my poorly insulated house, I cast my mind forward to those warm summer days ahead. It is no wonder then, that December, and more specifically, the festive period, is a time for quiet reflection and gentle consideration. I’ve used this time for the most important consideration of all. How to be marginally faster on a bike next year.

But while I could happily spend tens of thousands on a new bike, such funds are not available to me, so I wanted to make this a relatively sensible build, with choices that pack a punch when it comes to value.

Frameset: Giant Propel Advanced Pro (£1,539)

Giant Propel Custom Build Profile
Giant Propel Custom Build Profile (Image Credit: Liam Cahill)

Given my intentions of creating a speedy race bike for racing and group rides, the only place to start was with an aero frameset. Giant’s Propel Advanced Pro is one of the best deals on the market, even at RRP.

This 2025 model, however, is an even better bet at £1,539. 

Giant developed the Propel for its World Tour racers, and the majority of the aero trickery has found its way down to this model. That means it should be plenty fast enough for group races and a spot of racing.

Giant Propel Custom Build top tube detail
Giant Propel Custom Build top tube detail (Image Credit: Liam Cahill)

While we’re on the frameset, I’ll also say that this was an incredibly easy frame to work on. Everything was easy to put together and Giant had evidently given the brake routing some thought, because I had the callipers installed quickly.

Wheels: Yoeleo QianKun CS60 (£1,052)

Giant Propel Custom Build Yoeleo C60 wheel
Giant Propel Custom Build Yoeleo C60 wheel (Image Credit: Liam Cahill)

A deep set of wheels perfectly complements an aero frameset and Yoeleo provided their 60mm hoops with carbon spokes.

While you might think splashing out for carbon spokes is an expensive choice, they have a massive benefit when it comes to weight, with Yoeleo claiming the QianKun C60s weigh just 1,285g without tape.

Giant Propel Custom Build front hub
Giant Propel Custom Build front hub (Image Credit: Liam Cahill)

The rims are fully up to date with current trends, using T1000 carbon to form an internal rim width of 23mm, ensuring they work well with 28 and 30mm tyres. This is also a hooked tubeless-ready rim, giving you a huge choice when it comes to selecting tyres.

Everything spins on Yoeleo’s own hubs that feature a 36T angular ratchet system for improved contact surface. For fans of a loud freehub, these really scream at speed.

Groupset: Shimano 105 Di2 (£849)

Giant Propel Custom Build 105 shifter
Giant Propel Custom Build 105 shifter (Image Credit: Liam Cahill)

Shimano’s 105 groupsets have long been a popular choice in the lower echelons of the racing world. The fact is that, in bunch racing, crashes occur relatively frequently and this is why I’ve gone for the slightly more value-focussed 105, rather than Ultegra or Dura-Ace.

Should I have a little mid-race sit down, I won’t be too fussed about scratching these levers, and replacing a 105 Di2 rear derailleur is quite a bit cheaper than Shimano’s bigger brothers.

Giant Propel Custom Build rear derailleur
Giant Propel Custom Build rear derailleur (Image Credit: Liam Cahill)

What also makes this groupset perfect for racing is the gearing. A 52/36T chainring combination pairs well with the 11-34T cassette to mix the fast stuff I need for group rides, with the bailout gears I’ll turn to when the road rises up.

Tyres: Specialized S-Works RapidAir TLR Race (£150)

Where I have made a slight mistake is in my tyre selection. I had a set of the S-Works RapidAir TLR Race tyres lying around, and in the spirit of saving money, I decided to use them.

Despite inflating easily and offering a comfortable ride, I haven’t found confidence in their grip levels, and so I would be looking to swap these come the spring.

But the point I was trying to make (mostly to myself) is that a new bike build can always make use of spare parts that you might already have. As we approach the finishing kit, this point will be back with more success.

For now, I have assigned £150 for a set of race tyres. 

Power meter: Magene P515 (£299)

Giant Propel Custom Build Magene crankset
Giant Propel Custom Build Magene crankset (Image Credit: Liam Cahill)

But first, we need to cover the most effective way to make yourself faster. Fitting a power meter to your bike will not make you faster, but training effectively will have a massive impact on your speed.

There are a number of different power meter solutions on the market, with pedals being an increasing subtle and popular option. But I have always appreciated the robustness of a chainset spider power meter.

They generally offer dual-sided data, long battery life and because the tech is established, reliability is more often guaranteed. 

Finishing kit (£120 total spend)

Giant Propel Custom Build pro vibe bar
Giant Propel Custom Build pro vibe bar (Image Credit: Liam Cahill)

To finish the bike, I was keen to save money, so I turned again to my parts bin for some ‘freebies’.

Giant Propel Custom Build saddle
Giant Propel Custom Build saddle (Image Credit: Liam Cahill)

A basic Pro saddle is ideal for such a bike. I find it comfortable and should I ever damage it in a crash, I wouldn’t be sad about it breaking. Yes, there are much lighter saddles on the market, but this isn’t a weight weenie build.

The handlebar, too, is from Pro in the form of a Vibe Aero Superlight. Retailing at £290, this is not a budget-friendly option, but I had it left over from breaking down a previous bike, so I thought putting it to good use here would be a sensible step.

Carbon, however, would not be my first choice for a race bike. If I needed to buy a bar for this build, I would select a basic alloy bar. It might fare better should the bike hit the tarmac and really, the most important aspect of a bar for a race bike is the fit.

Spending a little money on some grippy tape is a nice way to make any bike feel a bit more special. I opted for a roll of M Part tape from my local bike shop, but BBB’s Gravel Ribbon is another excellent choice around the £20 mark.

I have chosen to assign £120 to the finishing kit as not everyone will have spare parts, but really, you don’t need to spend more.

Economising further

Giant Propel Custom Build profile 2
Giant Propel Custom Build profile 2 (Image Credit: Liam Cahill)

This brings the total to £4,009. While such a price represents a saving over complete bikes like Canyon’s Aeroad CF SL SLX 7 Di2 at £4,199, there are ways to bring such a build in at an even lower price.

Firstly, starting with a used bike is a brilliant way to stretch your money further. This is a little difficult to accurately budget, as bike availability changes all the time. You’ll also need to have some cash set aside to replace any worn parts.

Doing work on a used bike can also be a barrier for newer cyclists, but as someone who learned to strip a bike via YouTube videos, I’d strongly encourage you to have a go. Do consult a professional mechanic if you’re uncomfortable working on your bike, though, and do get a basic safety inspection from a professional at the very least. 

Secondly, being even more sensible with component choices could drastically reduce your costs. Electronic shifting, for example, is something of a luxury. Having mechanical gears will not be the reason I lose a race, and replacing a mechanical rear derailleur will be significantly cheaper.

All in all, I think I’ve built a cracking race bike if I don’t say so myself… 

What would you change, and what would stay the same if this was your bike? Let us know in the comments