BMC Teammachine SLR01 TWO Di2 Disc

[iamraymond]

Hello All,

I want to share the progress made to my BMC Teammachine SLR01 Disc TWO. The bicycle came from the factory with the Ultegra R8020 (mechanical/hydraulic) groupset, butI’ve always wanted to try Di2. Plus the bulbous hoods of the R8020 shifters and the external cabling pushed me to do the conversion. The Di2 simply looks ace on the SLR01 with everything hidden inside the stem and frame. I know I could have purchased the SLR01 ONE which comes stock with Ultegra Di2, but it was far out of my budget and I got a very good deal on the SLR01 TWO.

Here are some photos its original spec:

Obligatory BAAW


Direct mount RD


R8020 Shifters


The extra long stem



The Upgrade
Though I've always done my own maintenance, I had no experience building/converting a bike to Di2. Fortunately, there are very friendly folks on this forum who helped answer alot of my questions. I sourced all the parts online except for the BMC Di2 parts which I got from the LBS.

The bike came with the full R8020 groupset: 52/36 chainrings, 11-30 cassette, short cage derailleur. With the Di2 upgrade, I changed to 50/34 compact chainrings, a long cage derailleur, and an 11-32 cassette. I also fitted a Rotor chain catcher and a pair of Chinese carbon cages I had from previous bikes.

The LBS fitted the bike with a 120mm BMC ICS stem instead of the 100mm which are standard on 51cm frame. Although this longer stem certainly looked ‘pro’, I swapped it for a 90mm unit (which actually measures 95mm) for bike fit purposes.

I scored an awesome deal on a used set of DT Swiss PRC1400 with Vittoria Corsa G+ with tan sidewalls. These replaced the DT Swiss PR1600 spline wheels and grey Corsas which came with the bike. I still have the grey tires so I may try those on to see how they look with the deeper wheels. But for now, I love the gumwalls.

After all these changes the bike has essentially the same build as the SLR01 ONE model, but I managed to build it for approximately 60% of the cost. The complete bike with pedals, cages, and computer mount comes up to 7.54kg on my luggage scale.

Some build shots:

Bottom bracket removed (first time hammering it out was a scary event)


Testing out the components before installation


The difference between the R0820 and R08070 shifters:




Here are the after photos:











Future plans:
-BMC 0mm offset seatpost: my saddle is slammed all the way forward and it’s still not in the same position as my previous bike – it’s about 10mm off when measured from the BB. I even had to flip the top cradle of the seat post around, but I still could not get it to fit as I wanted.
-Carbon bars: looking for 70mm reach bars in the 200g range to replace the BMC alloy bars (335g).
-Saddle: I fitted the Selle SMP Lite 209 saddle from my Canyon since I get along with that saddle really well. The only thing I’m not fond of is it’s funny shape and weight (321g). I’m currently using the Fizik Alliante saddle (245g) which came with the bike, but it’s not as comfortable as the Selle SMP.
-Vinyl wrap the blue accents on the frame/fork. The blue accents are only on the drive side and I much prefer black-on-grey look of the non-drive side. I may go for the gold-on-grey look like GVA’s SLR01 from Paris-Roubaix.

[iamraymond]

Code: Select all

BMC SLR01 Frameset	980g
Fork	437g
ICS Stem spacers + plate	59g
ICS Stem 90mm	131g
Seatpost clamp	16g
Headset	54g
Seatpost	195g
Bottom Bracket	55g
Thru Axles	54g	
Rotor Chain Catcher	12g
BMC RAB02 Handlebar 420mm 70/125	335g
Fizik Alliante R5	245g
Bottle Cages	60g
SRAM bar tape	57g
DT Swiss PRC1400 DB Front	660g
DT Swiss PRC1400 DB Rear	790g
Ultegra Casette 11-32	284g
Vittoria Corsa G+	514g
Tubes	186g
Ultegra 8000 Rotors (160MM)	127g
Ultegra 8000 Rotors (140MM)	106g
Ultegra Chain	263g
Ultegra Cranke (50-34)	666g
Ultegra 8000 Calipers	280g
Hydraulic Hose	30g
Ultegra 8070 STI shifters (Hydro/di2)	364g
Ultegra RD-8050 GS Rear Derailleur	249g
Ultegra RD-8050 Front Derailleur	132g
di2 Cabling EW-SD50 (x5)	40g
-Junction B to Battery: 600mm 
-Junction B to RD: 550mm 
-Junction B to FD: 350mm
-Junction B to Dfly EW-WU111: 400mm 
-Dfly EW-WU111 to Junction A RS910: 150mm
Junction B (SM-JC41 4-port)	5g
Junction A EW-RS910	12g
Dfly EW-WU111	5g
Battery BT-DN110	52g

[jbaillie]

The new hoops and the smaller lever hoods definitely make a big difference aesthetically. I'll be interested so see what you wind up going with for a saddle. The Cambium C13 in 132 comes in around 259g and has a somewhat similar feel to the Alliante (IMO), but if you're looking for a real weenie that's probably still heavier than what you'll want to try out.

[fa63]

One of my favorite frames at the moment, and yours looks ace too. Well done!

[Klaster_1]

Great bike Can you measure the thickness as on the image below? I like how cagey BMC DM RD hanger with lots of material removed looks, very non-conventional.

[hannawald]

Nice bike and you have a space to save even more weight easilly. Agree with 0 offset seatpost.
If you change for lighter bars, saddle and Hutchinson Fusion 5 11Storm Galactik Tubeless Ready, you will save a lot, especially with the tyres..225g plus 30g sealant plus 5g tubeless valve..just compare to what you have now..
Schwalbe makes best high pressure tubeless tape, one layer is enough, around 5g per wheel.

[iamraymond]

Great bike Can you measure the thickness as on the image below? I like how cagey BMC DM RD hanger with lots of material removed looks, very non-conventional.

Yeah it's definitely one of the cooler features of the bike as there are many bikes out yet with this direct mount RD. If I recall, it was the first road bike to use it. I'll take some measurements once I find my vernier/caliper.

[iamraymond]

Nice bike and you have a space to save even more weight easilly. Agree with 0 offset seatpost.
If you change for lighter bars, saddle and Hutchinson Fusion 5 11Storm Galactik Tubeless Ready, you will save a lot, especially with the tyres..225g plus 30g sealant plus 5g tubeless valve..just compare to what you have now..
Schwalbe makes best high pressure tubeless tape, one layer is enough, around 5g per wheel.

Wow that's a considerable savings to switch to a tubeless setup. My current clincher setup with the Corsa G+ and tubes is 700g. Your recommended setup would be 530g. I've never really considered going tubeless, but I'll think about it. The weight savings and the comfort of tubeless are tempting.

[onemanpeloton]

Really interesting to see the difference in size between the mechanical and di2 lever. Thanks for sharing!

[iamraymond]

Yeah no problem. Here’s another photo showing the difference. It’s quite significant.

Also what was interesting is that the mechanical shifting (r8020 shifters, dérailleurs, cables) were actually heavier than the Di2 components even though you have to add all the wiring, junction boxes and battery. This is largely due to the heavy R8020 STIs compared to the R8070. (561g vs 364g).

The total difference between R8020 vs 8070 was only 35g, but it goes to show that electronic isn’t always heavier than mechanical.

[bilwit]

looking sharp

I also recently upgraded my SLR01 to Di2 (9070) and saw a modest weight saving. I'm in the process up upgrading my Roadmachine to Di2 as well and will be glad to get rid of those massive hoods (9120). I like the clean look with the ICS stem but I couldn't live with how heavy it is..

[iamraymond]

looking sharp

I also recently upgraded my SLR01 to Di2 (9070) and saw a modest weight saving. I'm in the process up upgrading my Roadmachine to Di2 as well and will be glad to get rid of those massive hoods (9120). I like the clean look with the ICS stem but I couldn't live with how heavy it is..

I'd be interested to see how you route the Di2 wires internally with a normal stem. Can you show pics? I am looking for alternative stems to the ICS but I don't know how the wires/hoses would route into the stem if you don't use the BMC ICS stem.

[bilwit]

looking sharp

I also recently upgraded my SLR01 to Di2 (9070) and saw a modest weight saving. I'm in the process up upgrading my Roadmachine to Di2 as well and will be glad to get rid of those massive hoods (9120). I like the clean look with the ICS stem but I couldn't live with how heavy it is..

I'd be interested to see how you route the Di2 wires internally with a normal stem. Can you show pics? I am looking for alternative stems to the ICS but I don't know how the wires/hoses would route into the stem if you don't use the BMC ICS stem.

My Teammachine is rim brake so I'm not sure where the hoses would go for hydraulic. On the Roadmachine there's a hole to route the rear hose right next to the downtube junction box and the front just goes straight into the fork.

[iamraymond]

Oh I see. I assumed you had discs. On the SLR01 and RM01, the hoses and Di2 wires go under the stem and into the top of the headtube. Looks like on the rim brake verison the Di2 wires enter the side of the frame.

[iamraymond]

Great bike Can you measure the thickness as on the image below? I like how cagey BMC DM RD hanger with lots of material removed looks, very non-conventional.

The RD hanger is 2mm thick and 8mm wide.