A bicycle pump is a type of positive-displacement air pump specifically designed for inflating bicycle tires. It has a connection or adapter for use with one or both of the two most common types of valves used on bicycles, Schrader or Presta. A third type of valve called the Dunlop (or Woods) valve exists, but tubes with these valves can be filled using a Presta pump.
Several basic types are available:
Compact or mini
Blast or tubeless
In its most basic form, a bicycle pump functions via a hand-operated piston. During up-stroke, this piston draws air through a one-way valve into the pump from outside. During down-stroke, the piston then displaces air from the pump into the bicycle tire. Most floor pumps, also commonly called track pumps, have a built-in pressure gauge to indicate tire pressure.
Electrically-operated pumps intended to inflate car tires (as available in most service stations) can in principle be used to inflate a bicycle tire if the right type of connection is available. Some such pumps are designed to cut off before a suitable pressure (much higher for a bicycle than a car tire), and will much under inflate the tire. Others may not cut off, but deliver a high rate of flow to fill the larger car tire, with a risk of over inflating and bursting a bicycle tire unless it is stopped with split-second timing.
Inflating tubeless tires requires an initial surge of air to seat the bead, and specialized pumps are available specifically for this task.
Hope you learned something 😃😃
Time to wash the bike and reflect on yesterday's 10 mile Timetrial. Last year I finished 60th and had the humbling realisation of just how much I needed to improve to get to where I need to be. This year I finished 29th and although as a racer your never 100% happy, it's a massive improvement and makes all the training worthwhile. Loving the journey! Thanks @mrstbrush for all the support.
In 2007, a friend got me to sign up for a Sprint Triathlon. I thought, “this is terrible, and I love it!”. I was hooked. In 2009, I did my first 70.3. In 2011, I did my first Ironman. I loved the highs & lows of the day. It was a chess match & opened a world of self-discovery. After 13 full Ironmans, I cry, laugh, feel despair, joy, & gratitude during each. No other hobby opens up the human experience in such a compressed time. 2011 started an obsession with getting to Kona.
From 2012-2017, I did 2-3 Ironmans per year. Each one was similar: train my ass off, sacrifice time away from family, almost qualify, rinse & repeat. My family supported me as tirelessly as I trained. My wife & daughter have sacrificed the most. Along with my girls, I owe gratitude to mom & dad who follow me all over the world. My sisters & their husbands do the same. All invest in my success & adopt my dreams, & I could never repay them.
In 2017 a new training partner came into my life. Through him, I found the love of the journey. After a rocky start to 2017, I did Chattanooga with hopes of a KQ. Despite a 12 minute flat, I did it! I followed with a great day at Ironman Florida. I finished the year being selected to Team Every Man Jack. In 2018, I realized my dream of racing in Kona. Despite injuries, I accomplished almost everything I set out to do, but I am hungry for more. In 2019, I am proud to race for EMJ & outstanding sponsors. I am inspired & humbled by teammates who are consistently the best amateur triathletes in the world. It is a gift to be the slowest guy on a fast team!
I hope my kids will find something they can be as passionate about as I am about Triathlon. I hope to set an example of what it means to work toward a goal no matter how old it is. My favorite thing is a midnight finish at Ironman. Each is inspiring in its own way. It is my greatest source of inspiration to see the perseverance, strength, and happiness of the athletes finishing after 17 hours of effort. They are the true heroes of the sport! ~ Daniel Royce [@imroycer81]
(📷 by @talbotcox)
Thank you for sharing your story with us, Daniel! Keep Tri'ing! 🏊🚴🏃 #humansoftriathlon
It was the club dinner and awards ceremony at the weekend. Thanks to @piesnotpetrol for being our guest of honour, after winning the inaugural Frank Cubis 50m #timetrial In 2018. If you fancy joining us and getting to win some trophies, our TT calendar of events for 2019 starts next month. Come along and give a TT a go. The website link is in our bio. #cycling#tt#triathlon#surrey#kingston#surbiton. Thanks to @tri_2_train for the 📷
Last week was a BIG culmination of TSS (Total Stress Score) that left me feeling fatigued but not depleted. I was originally looking forward to the ‘active recovery’ week however, I was doing activities off the bike to remain active, have a significant, endurance level of scope. Wasn’t feeling ‘rusty’ or heavy of limb, so I stayed off the bike for the majority of the week.
Boarstone was a redemptive ride for me, get-back-into-the-swing of being on the bike. The BUILD phase of the training plan starts and so does the challenging effort to come. This ride, however was an eternal boredom of ~170w for 10-13minutes at a time. I’m wanting to get to the challenging workouts, the BUILD part — the good stuff. •
30minutes into the 2 hours prescribed was more than enough. I ended the workout, stretched [yoga] for 30 minutes and showered. Much more satisfying than what TrainerRoad had suggested for me to do. I’m strategizing that perhaps for my ‘recovery’ workouts, to do activities off the bike — like bodyweight exercises and movement-mobility to be that challenge I’m wanting when I can’t be mentally bothered to do the workouts at recovery pace. //
TSS (Total Stress Score) 26/92
IF (Intensity Factor) 0.70/0.70