Target is to build a 20 speed bike with a weight of <9.3 kg (without pedals) and total cost of < SGD 2000.
More components listed below!
Model: LitePro A61 seatpost, Diameter 33.9mm, Length 600mm, Weight Limit 80 kg
Estimated Weight: 350 grams
Actual Weight: 314 grams
Price: 0. Included as a package with the MuEX frame.
Alternatives: Crius Seatpost (416 grams, weight limit 105 kg), LitePro Carbon Seatpost (300 grams), KCNC seatpost, Controltech Carbon seatpost
This is a lightweight seatpost that has a lower weight limit than most other seatposts, at only 80 kg. For a lightweight rider this is fine, but a heavier rider should use a stronger seatpost so as not to exceed the recommended weight limit.
Picture from Taobao
Another picture of the seatpost
Model: Biologic Impel
Estimated Weight: 230 grams
Actual Weight: 286 grams
This is a pretty normal saddle, and it comes stock on many Tern bikes. It is also cheap at only $20, and yet is quite comfortable. The red lines on the saddle also matches the lines on the frame very well. Slightly heavy though. Possible to save quite a bit of weight here if a lightweight (but more expensive) saddle is used.
Biologic Impel saddle. The lines come in other colours such as blue, green, orange, white, etc.
I have tried mounting the saddle on the LitePro seatpost and the clamp seems to be OK. It is not tilted as shown in the picture below.
Poor design or installation, causing tilted clamps on the saddle rails
Model: LitePro Monster
Estimated Weight: 200 grams
Actual Weight: 178 grams
Alternatives: LitePro Spirit ($30, 146 grams), LitePro SuperLight Carbon ($80, 99 grams)
Nothing special about this handlebar, it is strong and relatively lightweight, and also cheap. No need to use a fancy carbon handlebar, I can spend the amount saved on other components where it actually improves performance.
LitePro Monster handlebar
At this point, the bike can be said to be one third completed. The basic outline of the bike can be seen, with the handlepost and seatpost fixed up, together with the wheels. However, it is still far from done as there are still many components to be installed. From the pictures below, you can see that the FD roller and the RD hanger are already installed on the frame.
Some pictures of the bike building in progress!
View of the partially built bike
Hardly any components installed yet
Model: Shimano Road Flat Handlebar Shifters SL-R780, 2 x 10 speeds
Estimated Weight: 280 grams
Actual Weight: 274 grams
Source: Bike Discount
Alternatives: Shimano Tiagra SL-4600 flat handlebar shifters ($110)
The reason I chose a road flat handlebar shifter is because I am building a 2x10 speed bike. As explained in another post (Road or MTB Components for Dahon / Tern Folding Bikes?), it is best to use road components for a 2x10 setup.
I don't like to compromise on shifters, which is why I went for the top end flat handlebar shifter, SL-R780. Naturally it shifts very well, with light shifting and nice clicking feeling. It has Instant Release and Multi Release features which originated from the MTB shifters. Another reason why I chose this is because it comes in black colour which matches the colour scheme of the bike nicely.
The Tiagra SL-4600 flat handlebar shifters are very similar to this, except for the colour, and there is no Multi Release feature. Other than that, they are virtually the same. The Tiagra shifters are much cheaper at $110 for a pair, so it is a very good alternative.
2x10 speeds SL-R780 shifters
Glossy black finishing the matches the bike
Nice aluminium lever that gives a very high end feel
Top view of the shifter
Model: Shimano Deore LX V Brake Levers
Estimated Weight: 200 grams
Actual Weight: 206 grams
Source: Bike Discount
Alternatives: Shimano Deore XT BL-T780, Deore BL-T610/T611, Avid FR-5, Avid Speed Dial 7, KCNC or TRP lightweight brake levers, Extralite brake levers
For brake levers, it is a critical part of the bike. If the brake lever bends or snaps off while riding, it could be disastrous. Some of the lightweight brake levers look pretty flimsy and I am not sure if they will hold up to regular usage. I decided to go for the safe and solid option of Shimano brake levers. If is possible to save 100 grams here from using super lightweight brake levers.
A good and cheap alternative would be the new Deore BL-T610/T611 brake levers, the price should be around $30 for a pair.
Deore LX V brake levers. Comes in full glossy black colour to match the bike.
V Brake Caliper
Model: Shimano Deore XT BR-T780 V brake calipers
Estimated Weight: 330 grams
Actual Weight: 355 grams
Source: ChainReactionCycles (CRC)
Alternatives: Deore LX BR-T670, Deore BR-T610, Avid Single Digit 7, Extralite / KCNC super lightweight brake calipers
For V brake calipers, the performance is quite similar between Deore and Deore XT. The differences are mainly the surface finishing and the material used for the hardware. The Deore XT V brake calipers use stainless steel and aluminium hardware to prevent rust. Possible to save maybe 100+ grams here if super lightweight brake calipers are used.
Deore XT V Brake Calipers
Model: Stock grip from my Polygon Cozmic CX 3.0
Estimated Weight: 120 grams
Actual Weight: 104 grams
Source: Any bike shop
I just used an extra pair of grips that I had lying around, no need to buy a new pair. These lock-on grips are actually quite lightweight. A similar pair of grips can be found at almost every bike shop for $20+. Foam grips would be even lighter though.
Entity branded grips. Lock-on grips and also lightweight, not bad for a stock grip!
This is the end of the second part of the guide! In the third part of the guide, the rest of the components (mainly drivetrain components) will be shown.
Part 3 of the guide is now up! Click here to continue reading.