Di2 and disc brakes

PaddyHound

Hi Everyone

I started cycling last year after buying a sweet Trek road bike from a friend who is big into cycling.

I have done some single day events on the bike and I was looking for a multi-day event in 2023. I was reading up about the Ras and I was thinking this could be a good option.

I'm just not sure how neutral service works in this event as I've heard this can be a big problem these days for older bikes. I was thinking I probably need to look at installing disc brakes and di2 on my trek.

Does anyone have any experience doing this and is it easy to do? Any advice would be welcome.

Thanks

Paddy

magicbastarder

you're thinking of the ras? as in the competitive ras?

hesker

You need to train harder. Practice really winding it up and you won’t need di2

PaddyHound

https://www.boards.ie/discussion/comment/119935086#Comment_119935086

My friend did it a couple of years ago and said it was competitive alright but not too bad. He didn't finish because of a mechanical half way through which is what I'm hoping to avoid

iwillhtfu

This is a wind up surely.

I think you might need to do a bit more reading on the Rás. It certainly isn't easy and finishing is highly regarded but then difficulty is relative, you could be the next Eddie Dunbar.

ednwireland

di2 can be fitted no problem. disc brakes can't you need mounts on the frame and the stresses are completely different.

and yes this must be a wind up

Quigs Snr

This is surely a troll post. But I'll play ball.

Unless your bike is built for discs then you can't install them on it. Di2 or not, doesn't matter. If you don't have discs on your bike and you need them, then you need to buy a new bike.

That being said 4 out of 5 of the riders on our team last year rode rim brakes in the RAS (quicker wheel changes from the team car). So you should be fine. And you will need a team car, because individual entries are not permitted and team cars with two occupants are mandatory.

Which brings me to your bigger problem. I suppose its technically possible that you could start cycling last year and get around a RAS next year, providing you have been operating at a high level in some other endurance sport up until now. Or if you have gone through the ranks already and are comfortably operating at the A1 level, finishing in the bunch in most races.

If not, you probably don't need to worry about Neutral service unless you puncture in the first 5k of the stage because Neutral generally stays with the first group or two and the standard is such that it is going to be a real struggle to make it into those groups for all but the most outrageously talented relative newcomer (and even at that, having the power to hold in there is a long way, away from having the bunch skills and race craft to stay in there and upright).

Kudos for the ambition though. Go big or go home as they say.

youtheman

Do I take it that your current bikes doesn't have disc brakes but you are thinking of retro-fitting them ?

PaddyHound

I found an article on the site roadbikerider talking about conversion from rim brake to disc brakes, and they think I need to get a new fork.

Wondering would something like the below work.

I would have thought I need to stick to a Trek fork but my current one says "Easton" on it so I guess I could look at other brands.

DESCRIPTION

Trek FX Rigid Fork | Disc | 700c | Black

DETAILS :

• Wheeles : 700
• Streerer : 1"1/8
• Compatible with Trek FX Disc Frame

MORE INFORMATION

FEATURES

Steerer1''1/8Front axle9 x 100 mmLockNoWidthRigid ForkFork Caliper MountNoneOffset (mm)50

magicbastarder

are you allowed enter the ras if you're not on a team?

someone racing with a year's experience on a bike would be lethal in the ras.

Squidgy Black

https://www.boards.ie/discussion/comment/119935201#Comment_119935201

No it’s not open to individuals, but you can theoretically register your own team provided you have 5 riders with racing licences

Elvis Hammond

OP, which single day events did you do?

cletus

...but do you have any skills?

PaddyHound

My choice of event seems to be derailing my main question. I'm not worried too much about the event itself but more getting the technical details right for the bike right so I can at least finish the thing, and without breaking the bank.

Rest assured I have cycled for nearly 40 years in Dublin rush hour traffic so know how to handle myself and will most certainly NOT be lethal to any participants, myself included.

Thanks quigs snr and others for the advice so far. Getting a new bike isn't really an option for me though as I already spent €3000 on my current one and I still haven't sold my hybrid that this replaced so my family would kill me. I would also really like to avail of the neutral car service if something happens.

The more I read about disc brakes the more I want them anyway.

PaddyHound

Next question:

What would be the best way to fit the battery that's needed for di2? My seatpost is stuck so I can't think of a way to get it hidden inside the frame.

I was thinking anyway it would be tricky to drill and run the cable internally, so probably easier to keep it all external. I have a pre-existing mount on my frame that might support this, although I'm having a hard time finding out the exact diameter of the battery itself.

cletus

...

PaddyHound

Pre-existing battery mount is probably in a good spot for it. Thoughts?

Elvis Hammond

That's for a pump. Are you not going to tell us what single day races you did?

fat bloke

Don't mind the Rás, there are great multi-day events involving tours of France and Italy and Spain. They're on over the summer too so the weather is much nicer.

Lumen

I suppose it's possible that you're confusing the presumably-named-by-an-idiot "Race the Rás" non-race event with the actually-a-race Rás.

PaddyHound

https://www.boards.ie/discussion/comment/119935565#Comment_119935565

Good to know but still looks like it would be perfect, or am I missing something.

I did a good few single dayers and thanks for your interest but like I said the event itself isn’t a big concern

PaddyHound

https://www.boards.ie/discussion/comment/119935569#Comment_119935569

Thanks. I'm not a big fan of travelling and I imagine trying to get to France with a bike is a nitemare so would really rather stick closer to home. Besides I'm looking for a big challenge and cycling is easy when the weather is nice! :-)

joey100

You might want to have a word with your friend, you said you have spent 3000 euro on this one. It's an alu trek with external cable routing, be worth at most 800 euro I'd guess.

On the off chance you are serious, you won't be able to put di2 disc brakes on it. It won't have routing for the rear hydraulic line. Also the new di2 disc stuff is made for internal routing, and yours has external. It would also cost around 500 euro for shifters, 2 x 60 euro for calipers. 300 euro rear derailleur, 200 euro front. Then about 6 cables at 25 euro each. Juntion box A and b at around 140 euro. Battery at around 150 euro. New wheels (approx 300 euro) to take the disc brake calipers (45 euro per caliper), another decent cost. Probably a new crank as well to take the 11 speed chain, around 250 euro.

Elvis Hammond

https://www.boards.ie/discussion/comment/119935622#Comment_119935622

Oh, I suspect you're missing something alright. Why so evasive re. the 'single dayers'?

PaddyHound

https://www.boards.ie/discussion/comment/119935713#Comment_119935713

thanks… although I doubt 800 is realistic! It’s a newer 5th generation lightweight aluminium so is super light.

A guy I know is a welder so I must have a chat with him about it but it seems like it would be easy enough to weld some small brackets for the hydraulic line. And then a plate at the bottom on the back to put the calliper. I’ll try upload a diagram in a bit to explain better.

the parts are expensive for sure but a better option than a whole new bike from my perspective. I’ll try and shop around for some deals anyway as I have some time

PaddyHound

Also I’m running 22-speed at the moment. Do I need a single front ring to make it compatible with di2 gear shifters?

Mefistofelino

So you are, at the least, in your mid / late 40s, no real evidence of ever having actually raced but within the next 6-7 months you are going to reach at least the A3 licence standard to even be allowed enter, and find a team prepared to take you on board. And that's all in addition to taking a 15-20 year old (but functional) bike and converting it into something from Scrapheap Challenge.

Have you considered asking GCN or Netflix if they'd be prepared to make a documentary about this?

PaddyHound

Initial idea...

dahat

I find this hilarious being honest.

Diarmuid

Yeah that should be fine. I don't know if you even need to weld it. I think a few zip ties and maybe some epoxy will keep the calipers in place. While you're at it, stick a few speed holes in the frame for some added aerodynamic advantage.

Why 22 speed? Isn't it worth going to 24 speed at a minimum? Maybe a triple up frony for 36 speed?

GandhiwasfromBallyfermot

https://www.boards.ie/discussion/comment/119935910#Comment_119935910

Looks great, please please please post pictures when you are finished.

Elvis Hammond

Going for a suspension fork. Nice ...

PaddyHound

https://www.boards.ie/discussion/comment/119935939#Comment_119935939

Thanks. I guess i'd probably consider epoxy or some other kind of strong adhesive if it was a carbon frame but seeing as it's metal, welding seems like the easiest option. Plus I know a welder who has all the equipment, so problem solved.

Also I already have 22 speed, but just need to electrify it assuming 11 speed and 22 speed drivetrains are cross-compatible. I'd be a bit concerned about the reliability of a tri-front hub even though 33 speed would be sweet.

Mefistofelino

https://www.boards.ie/discussion/comment/119935927#Comment_119935927

Could have been, but OP shot his wad in the first couple of posts.

Need to play the line out slowly in these things..

Chips Lovell

If you're struggling to find somewhere to put the battery, perhaps you could put it in a little backpack and then run a wire from it down to the bike?

magicbastarder

strap the battery to a mudguard.

wersal gummage

https://www.boards.ie/discussion/comment/119936076#Comment_119936076

Was just popping in to say don't forget to get mudguard compatible new fork, in case it rains during the Ras.

Probably also worth getting yourself a good Italian or Spanish doctor if you need to be ready to race in such a short time.

oflahero

If you could coordinate with your team car, you could run the cable from the bike through an open window in the car to a USB. I would advise practising some motor pacing for at least a week beforehand though as this is an advanced skill. Maybe check with other participating teams on how they have managed their positioning in this way and to ensure nobody gets in your way unduly during the race while doing this.

Squidgy Black

https://www.boards.ie/discussion/comment/119936103#Comment_119936103

Would it not be better to have it in your rear jersey pocket, and you could just do quick changes of batteries without moving.

But a cycling jerseys a bit of an expensive purchase I guess, no real need for one if you’re only doing the odd sportive and then the Rás

magicbastarder

https://www.boards.ie/discussion/comment/119936103#Comment_119936103

having a skilled drone pilot in the car, with the battery cable running from the drone to the bike, would be safer than running the cable directly to a car.

Raam

are you allowed to cycle on the footpad in the rás?

Trekker09

https://www.boards.ie/discussion/comment/119936290#Comment_119936290

No need for a battery. Use a googanised flux capacitor with full flummax connectors

Whatwicklow

This must be a wind up 😂

PaddyHound

Please stop with the crazy ideas. Although some are funny I’d like to keep the thread focused on the task. Thanks everyone :-)

i was just thinking now if it would be better to put the rear disc calliper above the tube, inside the triangle. I think this would be better as the rotational force would be pushing the calliper towards the tube rather than pulling it away. It would also give me a lot more ground clearance should it be needed

Also, if anyone can recommend a crash course in bike frame building this could be helpful for me to get a better understanding of the forces at play, and to back up my years of experience of practical real world physics

cletus

Nah, sorry you've lost it now. There was a kernel in the first few posts, you were playing it just enough (well maybe a little heavy. You brought up the Ras too soon).

But now? You might as well just close the thread

Bambaata

Dont forget to ask that welder mate to put something on the bike for the basket! Your bike doesnt seem to currently support one!! You'll never get through the Ras without easy access to some ham sandwiches, washed down with warm sugary tea through each stage.

Looking forward to the interviews with this lad @Quigs Snr !

This thread has this vibe to it

In the old days of boards it would have been captioned " I would have gotten away with it too if not for that pesky muppet check thingy" 😅

For those not familiar, it was a tool mods had to check if different posters were one and the same via IP address if I recall ?

TheDocMan

Hmm! What's a "tool mods" job on boards again??

PaddyHound

Things are progressing nicely. Not sure about your basket suggestion but I’m still trying to figure out what disc brakes to install. Is there a disc calliper i can get that would be adjustable to take multiple size rotors? It seems like something that should exist.

I’m just wondering because I’ve no idea what the neutral car service dudes will give me. God knows that these fecking eejits could throw anything at me and I just have to deal with it!

Seth Brundle

https://www.boards.ie/discussion/comment/119943599#Comment_119943599

Aah would you stop

Raam

don't forget the aerobats