Can you ever have too many bikes?
Well I suppose it depends who you ask the question of! In our household I would naturally answer No of course you can never have too many, however my wife might just answer rather differently posing a question of her own. How many bikes can you ride at any one time!
Seriously though you do need a bike for each discipline you ride, don’t you. Who in their right mind would use a track bike to ride a BMX course and like wise who would ride downhill on a CX (cyclocross) bike! OK so I have chosen some extremes but I still recon that you need more then one bike.
Unlike some I am not totally mad with the number bikes I have and I have a sensible mix, a road bike (actually two if I am honest), an full suspension XC MTB, a track bike and a BMX.
Over the years the type of riding I have been doing has changed a little and the Full Suspension XC seems a bit of an over kill for riding things like Preston’s Guild Wheel and some of the disused railway lines locally, however a full carbon road bike does not quite fit the bill either! Leaving me with a bit of a conundrum, what to get to fill the gap? A hard tail MTB to replace the Full Sus or a CX bike?
Hmm tricky coz I really do not want to get rid of the Full Sus because it is really useful for those days out in the hills and trail centres. I know I could do these on a hardtail but then just maybe this would be over kill for the local trails.
Yes you guessed it I plumped for a CX bike, as I said you can never have too many bikes!! But I set myself a challenge I had to do this on a budget no more then £300 could be spent. I had a donor bike for most of the drive train and bars etc, so all I needed would be a frame, brakes, wheels and tyres.
My natural port of call for these parts was going to be ebay or discount online stores. First things first find out what is needed for a CX bike and which parts are the most robust for a bit of a hack bike and how much parts typically are. This is key to avoid over spending on eBay. It always amazes me that many buyers on ebay get carried away. The worst I have seen is a set of wheels go for £30 more then the buy now option for the same set from the same seller who had one set on open bid and another set available as buy now!
The donor bike was a Specialized Allez Sport with Shimano Tiagra triple chainset. I pondered long and hard over the triple chainset as my gut instinct was to go for a double CX specific or a double compact until I read this article http://bikehugger.com/post/view/the-rise-of-the-compact-crank which clearly defined the pit falls of a compact and the benefits of the triple. The decision to stick with the triple also meant I had less to buy with my budget, meaning more to spend on the frame.
Kinesis Crosslight Evo4 Cyclocross Frame 2010spend on the frame.spend on the frame.
Step 1 Frameset.
Having trawled eBay and the internet it seemed that the choices boiled down to a selection from:
- Graham Weigh frame and forks £199.99
- Forme Hiver (Paul Milnes) £274.99
- Paul Mines CT Wing £295
- Dolan Multicross £249.99
From these the best value for money seemed to be the Dolan as it included a seat post, headset and front cable hanger. However this did not leave me with much in the budget for wheels. So back to the drawing board and review the second hand options via eBay. Patience and timing had to be the watch word now. As I write there are very few frames on open bid. I missed out on a couple by a few pounds but I had set my target and was sticking to it.
Finally I hit the jackpot with a rather good Kenesis Crosslight EVO4 and BikeRadar’s review seemed to rate the frame
so in for a penny in for a few quid!
Step 2 Brakes
The frameset was set up for cantilevers only but which set to get? Shimano CX50’s, Avid Shorty, Tektro V brakes, Empella Froglegs or Tektro CR 520?
Cash had to be king here and simplicity had to rule so a big thanks to Paul Milnes eBay store Tektro Colorado’s at £21.99 a full set it was
Step 3 Wheelset.
I struck gold here as a friend who had switched from a CX bike to a 29er still had a set of Shimano wheels that came off his Cannondale CX bike so £40 landed me 5 tyres and tubes and a set of Shimano WH-RS10’s. Not the most amazing wheelset in the world but functional.
Step 4 cable set.
Having used a mix of manufacturers in the past decided to try a new manufacturer for me and bought a set of low friction PTFE-coated stainless steel Goodridge cables from Chainreaction (user reviews 4.1/5).
The first thing to do was to strip down the donor bike a Specialized Allez Sport running a triple Shimano Tigra groupset. I would be using everything from this bike except the caliper brakes and saddle, or at least that was the plan.
As soon as the frame arrived from its original Coleford Gloucestershie home it was time for close inspection. The frame was pretty much as described on eBay except for a very small dent on the downtube and a small gouge hidden under a sticker on the headtube. If I am being really picky the packing of the frameset could have been better and I was rather disappointed that the seller had not used fork and rear end frame spacers to avoid crushing during shipping as I had requested. The good news was the frame was in full alignment and ready to build.
A quick clean down and removal of old cable protectors and it was time to apply helicopter tape to areas which might suffer from scuffing, cable wear or chain slap.
This done it was in with the bottom bracket, crankset and front mech, quickly followed by rear mech, handlebar stem, seat post, handlebars and finally cantilever brakes and wheels. Time to check the fit. First hop on and it was immediately obvious that the handlebar stem was going to be a tad too short. So out with the tape measure and size up the fit vs my road bike. It was very obvious that the 100mm stem going to be too short. 110 mm might just work but even this might leave me a little hunched up, so it would need to be 115 or 120mm. I plumped for the longer of the two a quick trawl on the internet and a 120mm Deda Zero 1 was acquired and fitted. Perfect sizing and hey presto one bike ready for setting up with cables.
The Goodridge cables where new to me and I was itching to find out how good they really where. Unlike normal brake cables which have flat spiral wound metal the Goodridge set are the same set up as a gear cable outer, with steel strands in the sheath orientated in the same direction as the cable (along the length of the outer). For gear cables this reduces compression of the outer and improves reliability of indexing.
Kinesis Pure CX Cyclocross Fork
I will be interested to see the effect on braking. I suspect that it will improve modulation and feel reducing any sponginess caused by the outer compressing during braking. The brake cables certainly proved to be very stiff and somewhat tricky to cut.
With careful measuring and cutting (measure twice cut once) all was well with both gear cables and brake cables. A really nice touch with the Goodridge set is the long leadin tails on the cable ferrules allowing for improved
water and grit protection. With careful fitting of the blue plastic outer it is possible to run the cables fully water and grit proof.
All finished time to ride.
WOW this is a quick bike. From the first turn of the pedals it is clear that this is a race bike with a real eagerness to move forwards quickly. To quote What Mountain Bike’s review
“The Kinesis Crosslight Evo is a highly evolved racer that proves even hardcore cyclo-crossers can be a fun and versatile trail/tarmac crossover option on non-race days.”
Very true and great fun was had on the first few rides proving that it was a very good choice to go CX and not Hardtail. However as time went on a couple of limitations started to show through and once again these confirmed the finding of Guy Kesteven
‘A major – but surprisingly common – technical terrain limitation soon becomes clear though. While the Tektro cantilever brakes on the Kinesis are usefully powerful – at least in the dry – the brake judder caused by fork flex on rough terrain makes the front wheel skip alarmingly.’
front wheel skip was the least of the problems the fact was that the amount of front brake judder, especially during descents, made the front brake totally redundant. Solution simples, fit a fork crown cable stop to replace the headset one. Cost £8.99 from Paul Milnes. Fitted cable recut and off we go again. Amazing the front brake is a different beast no judder at all even under the most powerful braking, bringing a high level of confidence to tackle technical descents with ease. Does make you think as to why Kenesis do not fit this simple device to the OEM bike in the first place. £8.99 is not a major cost to transform the ride.
MTB or CX well this being my first CX ride ever I am totally sold. This has to be the perfect tool for riding the local disused railway lines and simpler off road tracks, where to be honest even a hard tail MTB would be overkill.
What is even better is that I have managed to build a CX worth over £1000 for £300, result! Will I get rid of my Full Sus MTB? No it is horses for courses and to attack trails like Gisburn, Winlatter, Grizedale etc this will still be the machine to use but for a qucik blast along many of the SUSTRANS off road routes the CX EVO 4 will be perfect.
If you have never tried a CX bike and want to venture offroad but do not want to wreck your best road bike then find a frame on eBay and switch all your winter hardware onto a CX frame.
Bicycling Science, 3rd Edition
Everything you wanted to know about the bicycle but were too afraid to ask
David Gordon Wilson is British born Professor of Mechanical Engineering Emeritus at the Massachusetts Institute of Technology. He is the co-author of the first two editions of Bicycling Science and was the editor of the journal Human Power from 1994 to 2002.
This book covers the history of human powered vehicles and, as the title suggests, focuses firmly on the bicycle. It is a text in three parts: I Human Power, II Some Bicycle Physics and III Human-Powered vehicles and machines. Each of which can read independently of the others.
The third edition’s (2004) first section, I, ‘Human Power’ opens with a very informative and myth-dispelling addition to the growing canon covering the history of the bicycle. It is a short but authoritative supplement with diagrams and photographs smartly selected and well positioned to support the text. Rather refreshingly all claims, throughout the book, are fully referenced to allow the reader to delve deeper should they so wish along with a recommended reading suggestion here and there (is that a ‘get a life, Dey’ I hear from my ever loving partner!) For the more evangelical bicycle advocate there is a brief but telling list of ‘new’ technologies born from bicycle design, engineering and use; leading the way is the mass production and use of ball bearings with the oft-neglected good-roads movement also getting a mention – topical as the latter is today. Chapter one also covers, in sufficient detail for all but the expert, Human Power Generation. This encapsulates bicycle focused physiology (how energy gets to the muscles of a rider), biomechanics (how the muscle produce power at the pedals) and should, the author states, ‘allow the reader to feel qualified to absorb the main conclusions of the research papers in this area.’ It is essentially a well written literature review and I for one felt a little daunted at times but quickly discovered my research reading skills were revving back up to speed. The counter-intuitive description of ‘the timing and direction of foot force, choice of crank length, the effect of saddle height and gear ratio, and where to stand up or ‘bounce’ the upper body’ are all treated in depth and supported by evidence based research, with the tradition of the philosophical ever present. For the more competitive cyclist there is a very useful treatment covering the measurements of human power output, how to describe pedalling performance quantitatively and a very useful presentation into critical power using power-duration curves along with detailed pedal-force data and graphs. Non-round chainwheels also receive useful coverage, another highly topical debate in the age of Wiggo. There is a closing piece on the thermal effects of cycling. Again one only needs to observe the top riders and teams to see this science trickling in and, not before time, replacing much erroneous traditional methods. The conclusion to the chapter reads like a British Cycling ‘marginal gains’ to do list and the eight pages of academic references tell you all you need to know about the diligence of the author.
Section II ‘Some Bicycling Physics’ is the where I began my reading. For want of getting carried away, as I often do when physics takes centre stage, I shall be brief. Building on the power-duration data from the previous chapter the author presents a quantitative treatment of cycling specific physics. Anyone with an interest in physics, a little patience and, most usefully, a head full of positive secondary school memories, will be amply rewarded for their efforts. The main protagonists are all covered namely propulsive force, air resistance and rolling resistance. The author then takes it a step further; what happens when bumps are encountered – of vital interest to the classics riders out there. The concept of vibration frequencies is simply presented and should allow the reader to filter the engineering and physics from the marketing hype the next time a high-end bike is purchased. A lot of paper is devoted to the relationship between power and speed and this alone makes this book a must-read for anyone venturing into the world of the power meter. Bicycle aerodynamics is covered with the usual simple physics formula, text, graphs and some very eye-catching photographs to emphasise the points and aid the understanding of the concepts – all the while retaining a strong link to the context of the bicycle. Rolling resistance, with a focus on wheels tires and bearings ramps up the physics a wee bit but is well worth devoting time to, especially if, like me, you are considering taking the hand-built wheel route. A brief but detailed design, engineering and physics of braking, in differing weather conditions, brings to a close this very informative and rewarding chapter.
The final section, III, Human-Powered Vehicles and Machines, is where the author diverges from the bicycle as we know it. It is the authors stated aim to ‘… expand your experience, and perhaps to make you want to use, or even to design and make, some interesting human-powered vehicles other than bicycles.’ In it he takes a more utilitarian approach and differentiates between the developed and developing world, all the while suggesting that the more bicycling the better; ‘… Even in large countries, like the United States, over half the daily “person-trips” by automobile are of under 8 km (5 miles), a distance most people can easily cover on a bicycle in most weather conditions.’ This chapter contains varied examples of human-powered tools and of record breaking and other interesting vehicles – other than the standard bicycle. It concludes with a thought-provoking piece on Human-Powered Vehicles in the Future; one for all you light weight junkies, aero wheel obsessives and mono-blade maniacs. The piece on the hydraulic disc brake, coming as does so soon after a brief summary of governing body regulations and incentives, is somewhat prescient. The question hangs in the air, what drives the industry; science and performance or marketing? If it is indeed the latter then we are living in a dark age of delusion.
Overview, from the back cover
The bicycle is almost unique among human-powered machines in that it uses human muscles in a near-optimum way. This new edition of the bible of bicycle builders and bicyclists provides just about everything you could want to know about the history of bicycles, how human beings propel them, what makes them go faster, and what keeps them from going even faster. The scientific and engineering information is of interest not only to designers and builders of bicycles and other human-powered vehicles but also to competitive cyclists, bicycle commuters, and recreational cyclists.
The third edition begins with a brief history of bicycles and bicycling that demolishes many widespread myths. This edition includes information on recent experiments and achievements in human-powered transportation, including the “ultimate human- powered vehicle,” in which a supine rider in a streamlined enclosure steers by looking at a television screen connected to a small camera in the nose, reaching speeds of around 80 miles per hour. It contains completely new chapters on aerodynamics, unusual human-powered machines for use on land and in water and air, human physiology, and the future of bicycling. This edition also provides updated information on rolling drag, transmission of power from rider to wheels, braking, heat management, steering and stability, power and speed, and materials. It contains many new illustrations.
Bicycling Science – Everything you wanted to know about the bicycle but were too afraid to ask
David Gordon Wilson
MIT Press; 3rd Revised edition edition
Available in Paperback
RRP £19.95 (Paperback)
Last July, just crossed the line, head a blur. It’s unusually hot in Belgium, even for summer, touching thirty-eight degrees. Pull those legs down there, I think they are still attached and working, covered in dust – stuck to sweat, over the saddle. Lean the bike against the wall, disregard shown for the machine that has safely transported you all those kms, through the mêlée, the mayhem. Searching for a bottle of water, a chair to sit down, a towel to mop my face.
The sight of a local cyclist catches my attention, eyes transfixed, he looks like a pro. Sat on his top tube, in leggings and long sleeves. He has me questioning my senses, my eyes – I’ve raced hard, but am I hallucinating?! Nope, this is Belgium.
The idea of keeping your muscles warm isn’t uncommon, it’s probably one of the most basic and well-known principles in sport. However Belgian cyclists seem to take it to another level, and this profi was no different. I tried to reason with myself, in my post race state, leggings and long sleeves, in this weather? I thought he was plain mad…
A summer later, despite over twenty hours a week in the saddle, week in, week out. Despite roasting whilst racing in Turkey, slowly simmering away in forty degree heat. Despite my dangerous obsession of wearing my shorts in exactly the same place. I have no tan. The mix of English, Irish and Scottish blood, freckled skin, definitely doesn’t help. But there is something else.
Switch to a sunny summers day, deep August. An easy recovery ride, spinning through the lanes of Essex. It’s just over a year since East Flanders, I’m a year wiser, a year tougher. It’s a reasonably modest twenty-eight degrees, pretty good for British weather. Clem and Rhys relish the tanning opportunity, as talk turns from racing to possible café stops. The coach says eighteen degrees, but I have taken it further, in fact it feels weird to train in shorts these days. Races aside my legs havent seen the sun for months. Coach would be proud, Belgians quake, muscles are warm. Its long sleeves and tights in the sun.
Thankyou Rapha for your amazing support this season. I have absolutely loved using products like the Classic Winter Tights. Not sure I always wear them in the correct season, but I wear them more than anything!