A 400lb spring requires 400lbs to compress the first inch. And it takes 800lbs to compress two inches. etc. Coil springs are not produced to “exact” standards. If a coil is offered in 50lb increments (example: 350, 400, 450) a 400lb spring may actually be anywhere from 376 to 425lbs. Most quality spring manufactures have a slightly tighter tolerance, but that’s the concept.
Springs define total length as well as stroke. Running a coil that is too long or short in either measurement can create problems, most often premature coil bind, which limits travel and creates an infinite spring rate when bottomed, which means all your “suspension” is in the tyres. I grew up building custom cars and we had to be really aware of this. Now, some auto race teams deliberately bind corners out which is great, except there’s no forgiveness if the tyre misbehaves. Anyhow another thing for another day.
A coil spring’s support is based on its diameter (OD and ID), the actual coil’s wire diameter, how much elasticity the material has, how many active coils it has, as well as the angle of the active coils. Understanding coil springs is really an understanding of how the active coils behave, less active coils in a spring increases the resistance to compression. Most MTB springs have closed and ground ends for performance and ease of mount. These wrapped ends do not count as active coils. When a spring is compressed the outer coils contact the wrapped ends. Technically all the coils are compressed equally, but the outer active coils have a lesser distance to the wrapped end coils which is why they make contact and,
PRELOAD
Preload applies additional tension to the spring. It decreases the number of active coils. Tighten the upper spring perch to increase Preload, loosen it to decrease Preload.
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How To Whip How To Instructional
Have you heard the news? Australiaâs hottest rising star on the gravity front, Dan Booker, has recently signed a deal to ride for nuke proof bikesâ with global support!
Diaries Of A Professional Trail Fairy
Well hello, my name is Baxter and welcome to the first edition of my brand- new regular column right here in [R]evo Mag. Each issue I will be aiming to tell stories that give insight into the world of trail building as I see it.
Rocky Mountain Instinct Carbon 70
If youâve been following the mag over the years youâll know that rocky mountainâs are a definite favourite amongst our staff here at [r]evo.
PEAK AROUSAL
HERE HAS BEEN ONE KEY QUESTION WHICH ALWAYS INTRIGUES ME ABOUT ATHLETES AND HOW THEY PERFORM AT THEIR VERY BEST WHEN THE PRESSURE IS AT ITâS GREATEST, AND THAT IS, WHAT GETS THEM AMPED UP? WHAT GETS THEM INTO âTHAT ZONEâ MENTALLY WHERE THEYâRE ABLE TO BE THE BEST VERSION OF THEMSELVES AND NET THE BEST RESULTS?
RAISING CHAMPIONS THE A'HERN
LETâS MEET THE AâHERNS; THEREâS MUM AND DAD, OTHERWISE KNOWNS AS JEN AND NICK (A DUAL COMMONWEALTH GAMES GOLD MEDALIST AND TRIPLE OLYMPIAN IN HIS OWN RIGHT!) AND THEN THEREâS THE KIDS, BROTHER KYE (19) WHOâS A JUNIOR WORLD CHAMP AND MULTI-NATIONAL CHAMP, AND THEN OF COURSE THEREâS SISTER SIAN (22) WHO HAS BECOME ONE OF THE MOST RECOGNISABLE FACES IN AUSTRALIA WOMANâS CYCLING, A MULTIPLE-NATIONAL CHAMP AND OCEANIA CHAMP.
THE BEST BRAKES ON THE MARKET RIGHT NOW? GROUP TEST WITH NO DEFINITIVE CONCLUSION.
ASK ANY RIDER AND THEYâLL ALMOST CERTAINLY TELL YOU OF ALL OF THE DIFFERENT PARTS THAT MAKE UP A BIKE ONE OF THE MOST IMPORTANT THINGS IS A SET OF BRAKES THAT PERFORM REALLY WELL AND MOST IMPORTANT âFEELâ JUST RIGHT.
SUPPLY CHAIN PAIN
A KIN TO A LOT OF YOU OUT THERE WEâVE RECENTLY FOUND OURSELVES SWINGING BY OUR LOCAL BIKE STORE TO STOCK UPON A FEW PARTS AHEAD OF OUR PLANNED TRAIL ADVENTURES, ONLY TO FIND, EMPTY RACKS AND SHELVES? IS THIS THE NEW VERSION OF LAST YEARâS SUPERMARKET TOILET PAPER PANIC BUYING? WHERE HAVE ALL THE BIKES, BRAKE PADS, TIRES AND EVERYTHING ELSE GONE? WITH AROUND A 30% INCREASE IN BIKE SALES ACROSS AUSTRALIA (AND THE WORLD) DURING THE PAST 12 MONTHS ALONE, BIKES HAVE BEEN FLYING OUT THE DOOR THE SAME DAY THAT THEY ARRIVE⊠WANT A NEW BIKE? GET READY TO WAIT. THIS TIME LAST YEAR THE PRE-ORDER WAITING LISTS FROM MOST BRANDS FOR POPULAR BIKES WAS AVERAGING 1-3 MONTHS, NOW, ITâS BLOWING OUT TO ANYWHERE FROM 6 MONTHS TO A FULL YEAR! ITâS CRAZY. ITâS SCARY. IT SUCKS. BUT THE GOOD NEWS IS THAT THE BIKE INDUSTRY IS ON OUR SIDE AND BRANDS ARE DOING THEIR VERY BEST RIGHT NOW TO FIND SOLUTIONS TO TURN IT AROUND.
INDUSTRY AU
IN THIS EDITION OF INDUSTRY.AU WEâRE CHECKING IN WITH ONE OF AUSTRALIAâS LATEST AND MOST EXCITING COMPONENT FABRICATORS WHO ARE PRODUCING SOME REALLY INTERESTING AND INNOVATIVE GEAR FROM THEIR ADELAIDE WORKSHOP.
PIVOT 2021
WHEN IT COMES TO PICKING YOUR NEXT DREAM BIKE IN A PACKAGE THAT PERFECTLY SUITS THE STYLE OF RIDING THAT YOU LOVE MOST, YOU REALLY ARE GOING TO FIND YOURSELF UTTERLY SPOILT FOR CHOICE WITH PIVOTâS LATEST OFFERINGS.
AUS CYCLING 2021 DH NATIONAL CHAMPIONSHIP
FOLLOWING THE CRAZY YEAR OR CONFUSION AND CANCELATIONS THAT WAS 2020, THE VIBE FOR THIS YEARâS AUSTRALIAN NATIONAL DOWNHILL MTB CHAMPS WAS ALL ABOUT A âNEW YEAR, NEW MEâ ATTITUDE. FOR THE VERY FIRST TIME WE GOT TO SEE THE COUNTRYâS BEST GRAVITY RIDERS BATTLING FOR NATIONAL TITLES AT THE ULTIMATE VENUE FOR SUCH AN EVENT, MAYDENA!