Showing posts with label Shimano. Show all posts
Showing posts with label Shimano. Show all posts

Monday, 4 July 2022

Leverage

"Give me a lever long enough and a fulcrum on which to place it, and I shall move the world."
Archimedes

Well, that's all very well, Archimedes, but I bet you never tried to remove a seized-on cassette from a Mavic Aksium Elite hub.

Yes, the same cassette I broke my budget Lifeline chain whip trying to remove, still won't budge. All credit to Wiggle, they replaced the broken chain whip with something more substantial, at no additional charge and with free next-day delivery. It really was perfect customer service. However. I still can't move the cassette, a seemingly lightly-used Shimano 105 eleven-speed 11-28T, even with an eighteen-inch breaker bar - the lockring just won't budge. So why not leave it on, I hear you say? Because the rest of my set-up is ten-speed, plus I much prefer the spread of cogs on the bike's existing 11-30T Tiagra cassette, that's why.

Anyway, the net result of all this is that the project bike is off to my LBS for them to have a crack at it. A cost I didn't want to incur, especially as I just saw a secondhand bike going locally this morning that wouldn't have needed anything doing to it to bring it up to snuff and which would probably end up cheaper (and better!) than the project bike is going to be, once it's all done. Oh well, in for a penny, in for a pound...

Shimano 105 eleven-speed 11-28T, lightly usedThe immovable object

Monday, 13 June 2022

A mixed bag

Why yes, I have finally found a use for the spare set of Shimana Ultegra R8000 brake calipers I had knocking about...

Shimana Ultegra R8000 brake caliper, front, fitted

And yes, I have fitted some Lifeline Professional carbon and titanium (and very aesthetically pleasing) QR skewers...

Lifeline Professional Carbon/TI QR skewer, fitted

But also, yes, the Lifeline budget chain whip I tried to remove a cassette with did break on first use...

Lifeline chain whip, broken

All of which goes to show, there are some things you can economise on and others (like those that need to handle in excess of 40Nm of force) that really reinforce the maxim, "buy cheap, buy twice." Or, in this case, send back to Wiggle in a bad mood.

P.S. For the weight-weenies amongst you:

  • The front Ultegra caliper with stock pads weighed 181g, compared to 194g from the caliper it was replacing. However, I had to use the extra-long pivot nut from the old caliper because of the depth of my front fork, bringing the weight as fitted back to to 187g.
  • The rear Ultegra caliper with stock pads weighed 180g, compared to 190g from the caliper it was replacing. All in all, I realised a 17g weight saving by replacing both calipers. More importantly though, I now stop much better.
  • The combined weight of the Lifeline Professional carbon and titanium skewers is 45g. Yep, for the pair. This represents a saving of approximately 75g over the original pair, which is astonishing value given that these are currently reduced to just £18.99 (Wiggle) - be quick!

Tuesday, 24 May 2022

Project bike green run

You'll remember from last time that I've bought a project bike for £200 rather than spending upwards of £2k on something new and fancy. My goal is, through judicious upgrades, to turn it into something to rival at least the Boardman SLR 8.9 105, the cheapest bike (at £1,150) on my original "What should I buy?" post. I'm calling this the Bargain Bike Challenge. Anyway, here's the bike as bought - the only thing I've done to it thus far is raise the saddle:

The project bike, at the start

I say only but even that was a bit of a job - the composite D-Fuse seatpost is not round in cross-section but, as the name suggests, D-shaped, which means you can't really twist it to get it out if it proves stiff ... which it certainly did. I was just about to break out some form of lube, in the hope that I could channel some down into the seatpost, when it finally budged. Anyway, let's not digress. So this is the bike, a 2016 Giant Defy 2, in mostly original condition, as far as I can tell. The only thing that might not be original are these brakes which, correct me if I'm wrong, don't look like the original Tektro set that were on the spec sheet. Indeed, these are unbranded, and are shod with solid blocks rather than cartridge brake shoes. Having been out for a green run over the weekend, I can report that these are not very good at all, and will be getting replaced at the earliest opportunity.

Unbranded and ineffective brakes, plus a flat-spotted tyre

The other thing to notice from the picture above is the state of the tyre. Now the project bike has come to me shod with Continental Gatorskins (great) but the back one, as you can see, is very worn. Indeed, it is worn flat, in a manner that suggests it has either been run woefully under-inflated or, more likely, has spent a fair time on a turbo trainer. Either way, new tyres will also be high on my list of things to do early doors.

Tiagra 2x10-speed with 11-32T and long cageWhat else? Well, I can tell you from my green run pootle around the village (in figure of eight loops, to even out the effect of head- and tailwinds, of course) is that the gearing is okay, and well indexed. Yes, it's only 2x10 Shimano Tiagra, 50/34 at the front and 11-32 at the back. But look, there's a long cage there, which provides some scope should I want to make incremental changes in the future. I think my ultimate aim, budgetary constraints permitting, is 2x11 105 or Ultegra, with 11-34 at the back, but that's a bigger job, for further down the line. Maybe I could experiment with 52/36 at the front too, although I fear this may be beyond the financial limits of the project. Just as well, then, that for now, at least, I'm happy to report that the Tiagra set-up here works well, and certainly well enough to see off a lot more miles. Plenty of life in that cassette yet, I hope.

Another thing you can see quite well in this photo is the stock Giant SR-2 wheelset. Again, I can happily report that both front and rear run pretty true, so there's no urgent imperative to swap them out. They are quite heavy though, and you can feel that when you try to spin up to speed quickly (like cresting a hill, for example). So in time I will look to replace them if I can find something equally robust but significantly lighter without blowing the budget. That just might be the biggest challenge of all. Either way, it's something I'd probably only do when I was ready to change the cassette too ... and that's a little way off yet.

The other obvious take-home from taking the project bike out for a green run is that I'm not going to be immediately comfortable on it, even though the saddle has been raised to something like the right height. Sure, it is basically a comfy machine, with a supportive saddle, a well-padded (if slightly ragged) handlebar, good damping from the seatpost and fork, and more. But I think I might need to shift the saddle back a little, and there are changes needed in the cockpit, for me - the stem is only 100mm, and I think I might benefit from 110. Plus the pitch is perhaps too low - I might start by flipping it over and seeing if that feels any better.

And whilst we're on the subject of stems, why, oh why, do Giant bikes of this age appear to have a coffin shape around their stem logo? Hardly inspires confidence in the exposed road cyclist, does it? Ride fast and die!

Defy 2 cockpit

Of course, the other painfully obvious finding from the green run is that I have to adjust and get comfortable (and confident) too - I haven't ridden a drop-bar on the road since 1992, and it really shows. I'm depressingly timid around corners and in descents, and that'll have to change; after all, there's no point building a rocket if I ride it tamely.

So, the post green run verdict? Well, it's not a bad little bike, as it stands. My first priority is to swap the brake calipers for something better, and then to clock up some confidence-building miles. Check back here again to see how that goes...

Monday, 15 June 2020

Dieting is hard

It's getting harder and harder to shed the pounds. This was a hard-won tenth of a kilogram...

Two changes - first, I finally got around to fitting the new (to me, it's secondhand) carbon handlebar, a Truvativ Noir T40, which, as we have previously established, is so light it would blow away in a stiff breeze. However, it turns out that the original bar was pretty light too, for aluminium, and this only yielded an 83g saving, if the Kitchen Scales of Truth™ are to be believed. Never mind. Also pictured is the newly fitted replacement aero bracket for my GPS, which quickly failed in the same way as the original. Never mind.

The rest of the tiny weight saving came by putting on these excellent Shimano PD-R8000 Ultegra SPD-SL carbon pedals. I didn't buy them to save weight, I got them to enter the world of cleats and clipping in... but even so, I got a 14g weight saving across the pair. Yes, I weighed pedals to record a 14g weight reduction. You ought to feel sorry for me really.

Where else can I shave some weight off? Well, I could get a carbon stem, but that's going to be a lot of money for a tiny saving. A better bet might be to treat myself to a new saddle, maybe with carbon rails. Other than that, I'd just have to buy a new bike...