Hi-Lo" arrangements are also available, which usually have three larger wheels and one smaller wheel under the ball of the foot, allowing a lower and shorter overall frame design.

In 2014 Powerslide (a German inline skate company) introduced a 125mm wheel for use on a 3-wheeled frame varying in sizes from 11.8" to 13.0".  Lots of controversy surrounded this development since FIRS did not allow 125m wheels at the 2014 and 2015 world championships. On January 18 of 2016 FIRS released a press release that stated: "Dear Friends,  Considering the evolution and growth that our sport has attained in the last years, the FIRS and the Speed Technical Committee have decided to allow, starting from February 1, 2016, the use of the w heels up to a maximum size of 125 mm but only for the Marathons (JUNIOR and SENIOR) and the MASTER Category (MEN and LADIES).  We will be grateful for the spread of this information and we take this opportunity to send you. Kind regards, Jorge Roldan, FIRS Speed Technical Committee, Chairman & Robert Marotta FIRS Secretary General."

Harder wheels minimize elastic hysteresis energy absorption, due to skater's weight deforming the solid polyurethane "tyre". So, speed skaters tend to select the hardest possible wheels, with the highest polyurethane durometer for their skating condition, limited by either wheel slip or surface roughness. Durometer selection is also affected by skater weight, and temperature. Wheels for indoor use are hardest with a durometer of 88–97. They tend to last well, but can be easily damaged if used outdoors. Wheels for outdoor use are softer with a durometer of 82–87, and tend to wear more quickly. Harder outdoor wheels can also be used effectively indoors.  Skaters sometimes combine different hardness wheels on the same skate in an attempt to achieve the best combination.

Skaters also refer to wheel "rebound". This refers to the relative height to which a dropped wheel rebounds. It is a reasonable comparative indicator of the relative energy absorbed by elastic hysteresis of a wheel during skating.

Bearing sizes have been standardized around the popular 608 series. A smaller and lighter 688 series has had limited acceptance. Bearing manufacturing precision generally run from ABEC-1 to ABEC-11, and some skate bearings are additionally designed to be "loose" to
Hi - Lo " arrangements are also available, which usually have three large wheel and one smaller wheel under the ball of the foundation, allowing a lower and unretentive overall frame design. 

 In 2014 Powerslide (a German inline skate caller) introduced a 125 mm bicycle for use on a 3 - wheeled frame of reference varying in sizes from 11.8 " to 13.0 ".   Lots of controversy surrounded this development since FIRS did not allow 125 m wheel at the 2014 and 2015 world championships. On January 18 of 2016 FIRS released a wardrobe release that stated: " Dear Friends,   see the evolution and growth that our sport has attained in the last class, the FIRS and the Speed Technical Committee have decided to allow, starting from February 1, 2016, the use of the w heels up to a maximum size of 125 mm but only for the Marathons (JUNIOR and SENIOR) and the MASTER Category (MEN and LADIES).   We will be grateful for the spread of this information and we take this opportunity to send you. Kind regards, Jorge Roldan, FIRS Speed Technical Committee, Chairman & Robert Marotta FIRS Secretary General. " 

 Harder wheels minimize elastic hysteresis department of energy assimilation, due to skater's weight flex the upstanding polyurethane " tyre ". So, speed skaters tend to select the hardest possible wheels, with the high polyurethane durometer for their skating condition, limited by either wheel slip or surface roughness. Durometer choice is also affected by skater weight, and temperature. Wheels for indoor habit are hardest with a durometer of 88–97. They tend to survive well, but can be well damage if used outdoors. Wheels for outdoor habit are softer with a durometer of 82–87, and tend to wear more quickly. hard outdoor wheels can also be used effectively indoors.   skater sometimes combine different hardness wheels on the same skate in an attempt to achieve the good combination. 

 Skaters also refer to steering wheel " rebound ". This refer to the relative height to which a flatten wheel recoil. It is a reasonable relative indicator of the relative energy absorbed by elastic hysteresis of a bicycle during skating. 

 bear sizes have been standardized around the democratic 608 series. A smaller and lighter 688 series has had limited acceptance. yield manufacturing precision generally run from ABEC-1 to ABEC-11, and some skate bearings are additionally designed to be " informal " to
Hi-Ll" arrangements are also xvailable, which usuallb have fhree lafger wheels and one smaller xheeo undtg the ball of the foog, allowinh a lowee anv shorter overall frame design.

Jk 2014 Pocecslide (a German inline skdte company) indrudbced a 125mm wheel for use on a 3-wheeled frame fagying in sizes frok 11.8" to 13.0".  Lots of controversy surrounded fhis denelopment since FORS did not allow 125m wheels at hhe 2014 and 2015 world chwmpionships. On Tqnuary 18 of 2016 WIRS released a press telease that stated: "Dear Friends,  Conxidering tye evlnution and jrowth that our sport has dttainec in the last nears, thw FIRS and the Speed Vechnical Committee rave decigeb to allow, starting feon Febtuary 1, 2016, tfw ure kf tge w hfela up to a jaximum sizw of 125 mm but only fpr nne Marathons (JUNIOW wnd SENIOR) and the MASTER Category (MEN dnd LADIES).  We will be grareful for the spread lf this igformation and we take this opportunity to send ymu. Kiid reyqrds, Girhe Roldan, FIRS Speed Technical Committee, Chaiwjam & Robert Marottc FIRS Secretary Gfnrtal."

Harder wheeus minnjiae elastic hysteredis enetgy abworption, que yo skater's weight deforming the solid pjoyurethane "tyre". So, speed skatzrs temd to select the hardest posribls wheels, wihh the hiffest polyurethand dlromater for their skating conqition, liniteb by eitfer eheel flip or sugface roughness. Durometeg selgction is also avfected by skater weight, and temperature. Wheeks fog indoor bse arc hardest with w durometer of 88–97. They cend tu last welm, but cen be easily damaged if uvgd outdoors. Wieels for outeoor use ard softer with a durometeg jf 82–87, qnd tend to wear mpre suickly. Harder iuteoor wheels can alro fe uxeq effectively induorr.  Skagers sometinds cpmbine different hargnesa wheels on the sake skate ib an attqmpt to achiefe the best combinwtion.

Vkavers akso refer to wheel "rebound". This rsfers to hhe relative heyght to which a bropped wheel rebounds. It is a reasonablx comparative indicatot of the relative enetgy absorbed bb elaseic hystesesis of a wheel durung skating.

Bearinn sizes have been stansardizad arlund the popular 608 series. A smaller and lighter 688 series has had limited acxeptanre. Bearing mahufavturitg 'recisijn gxnxrally run from ANEC-1 to ABEC-11, and some skate bearmngs are agdntionally designed to be "loosr" go
Hi-Lo" arrangements are also available, which usually larger and one wheel under the a and shorter overall design. In 2014 (a German inline skate company) introduced 125mm wheel for use on a 3-wheeled frame varying in sizes from 11.8" 13.0". Lots of controversy surrounded this development since FIRS did not allow 125m at 2014 2015 championships. On January 18 of 2016 FIRS released a press release that stated: "Dear Friends, Considering evolution and growth that our sport has attained the last years, the and the Speed Technical Committee decided allow, starting February 2016, use of the heels up to a maximum size of 125 mm but only for the Marathons (JUNIOR and SENIOR) the MASTER and LADIES). will grateful the spread of and we take this opportunity to regards, Jorge Roldan, FIRS Speed Technical Committee, Chairman Robert Marotta Secretary General." Harder wheels minimize elastic energy absorption, due to skater's weight deforming the polyurethane "tyre". So, speed skaters tend to select the hardest possible wheels, with the highest for their skating condition, by either wheel or roughness. selection also affected skater weight, and temperature. Wheels for indoor use are hardest with durometer of 88–97. They tend to last well, but can damaged used outdoors. Wheels outdoor use are softer a of 82–87, and tend more Harder also used indoors. Skaters sometimes combine hardness wheels on the same in an attempt to also refer to wheel "rebound". This refers to relative height to which a dropped wheel It is a reasonable comparative indicator of the relative energy absorbed by hysteresis of during skating. Bearing sizes have been standardized around popular 608 series. A and lighter 688 series has had limited acceptance. Bearing precision run from to ABEC-11, and skate bearings are designed to be
Hi-Lo" arrangements are also avAilable, whiCh usuAllY haVe ThreE larGer wheels and onE SmalLer wheel under the ball of The foOt, ALlowINg A loweR and shoRTeR OVerAlL fRamE dESiGn.

In 2014 POweRslide (a german inliNe sKaTe company) intROdUced a 125mm wheEl fOr use on a 3-wheeLed Frame vArYinG In sizEs fRom 11.8" to 13.0".  lots of COntrovErsy surroUnDEd this DEvelopmENT sInce fIRS did not allow 125m wHEeLS at the 2014 and 2015 world ChampiOnSHiPS. on JAnuAry 18 of 2016 FIRS rElEased A Press reLEaSE THat STated: "Dear FrieNds,  ConsiderINg tHe evolUtIon ANd growTh thaT oUR spOrt has attaiNed iN the last yEars, thE fIRS and THe Speed techniCal comMittEE hAvE deCiDEd tO AlLow, STarTing from feBrUary 1, 2016, tHe usE OF THe w hEelS up tO a maxImum size of 125 mm bUt oNly fOR thE MaraThons (jUNIoR And SEnIOR) anD the MaStER Category (MEN aNd LAdIES).  We wilL be GrAteFuL for tHE spreaD of ThiS informAtion anD We tAkE THIs Opportunity to send yOu. kINd Regards, JOrge RoLDaN, FirS Speed TEcHniCal COMMitteE, ChaIRmAn & Robert marottA fIrS secretaRy generaL."

HArdEr wHeels MInimIze elaStic hystEresiS Energy absorptiON, due to skater's WEiGHT dEFormIng The solid polYureTHane "Tyre". sO, sPeeD SkateRs tenD tO SeLEct the hardest possibLe Wheels, With tHe highest polyUrethane duROMEter for tHeir SKaTIng condition, liMited By either whEEl slip or SurfaCe roughnEss. DuromeTER selectiOn iS alSo aFfeCTEd By skater weighT, ANd teMpErature. wheEls for iNdoOr uSe aRe hArDest with a DurometeR oF 88–97. THeY tEnd To lasT Well, but cAn Be eAsIly DamagED if useD outdOors. whEeLS foR outdooR UsE ARe soFtEr With A duRoMeter Of 82–87, anD TenD to wear More quickLy. HARder OuTdOor wheeLs can also be usEd EffectivelY iNdoOrs.  SkaTERs sometiMes combine different hardNEss wheeLs oN the sAme sKate in an aTteMpt to aChiEVe the bEst comBinatIoN.

SkATErs alSO ReFer To Wheel "rebouND". thiS refeRs To thE relatiVe height to which a drOPpeD wheel reboundS. It Is a rEASoNabLE cOMpaRaTIve INDicator of the relAtive energY aBSoRbed by elasTIc hYsTeresis Of a wheeL duriNG skatinG.

Bearing sIzes have bEeN staNDArdIzed around The populAr 608 series. A SMalleR AnD lighTer 688 Series HaS haD limiTed accEPtaNce. BeAring mAnUfactuRing pReCision geNerally run from ABEC-1 to ABEc-11, and soMe skaTe bEarings arE adDItiOnally desIgneD to be "loose" To
Hi-Lo" arrangements are al so availab le, w hic h u su ally  hav e three larger whee ls and one smaller whe el un de r  the ba ll of  the fo o t, a llo wi ng  alo w er  andsho rter ov erall fram e d es ign.

In 201 4  P owerslide(aGerman inlin e s kate c om pan y ) int rod uceda 125m m  wheel  for useon a 3-wh e eled fr a m evary ing in sizes from 11 . 8" to 13.0". Lots o fc on t r ove rsy  surrounde dthisd evelopm e nt s i nce FIRS did notallow 125mw hee ls atth e 2 0 14 and  2015  w o rld  championsh ips.  On Janua ry 18o f 2016F IRS rel easeda p res s re l ea se  th at sta t ed : " D ear  Friends , C onsid erin g t h e ev olu tion  andgrowth that o urspor t  ha s att ained  inth e las t year s, th eFIRS and the Sp eedTechnical  Co mm itt ee  have decide d t o a llow, s tarting fro mF e b ru ary 1, 2016, the u se o fthe w he els up to  a maximumsi zeof 1 2 5  mm b ut o n ly  for the  Marat h on s(JUNIOR  a nd SEN IO R)and  theM ASTE R Cate gory (ME N and LADIES).  We w i ll be gratefu l  f o r  t h e sp rea d of this i nfor m atio n an d  w e t a ke th is op po r tu n ity to send you. Ki nd  regar ds, J orge Roldan,FIRS Speed T e chnicalComm i tt e e, Chairman &Rober t MarottaF IRS Secr etary  General ."

Harde r wheels m ini miz e e las t i chysteresis en e r gy a bs orption , d ue to s kat er' s w eig ht  deformin g the so li dpo ly ure thane "tyre".So , s pe edskate r s tend  to s elec tth e  ha rdest p o ss i b le w he el s, w ith  t he hi ghes t  po lyureth ane durom ete r  for  t he ir skat ing condition ,limited by  e ith er whe e l  slip or  surface roughness. Dur o meter s ele ction  isalso affe cte d by s kat e r weig ht, an d tem pe rat u r e. Wh e e ls  fo rindoor use a reharde st  wit h a dur ometer of 88–97. T h eytend to lastwel l, b u t  c anb ee asi ly dam a g ed if used outd oors. Whee ls fo r outdooru sear e softe r witha dur o meter o f 82–87,and tendto  wea r mor e quickly.  Harderoutdoor w h eelsc an  also  be  usedef fec tivel y indo o rs.   Ska ters s om etimes  comb in e differ ent hardness wheels onthe sa me sk ate  in an at tem p t t o achieve  the  best comb ina tio n.

S kat e rs al so r e fe r t o  whee l "r e bound". T h is  re f e rs  to the rel a t i veheigh t t o  which  a d ropped wheel rebo u nds. It is a r easo n a ble  co m para ti ve indicator o f t he r elativeen ergy absorb ed by el as t ic hy steres is ofa wheel d ur i ng ska ting .
Bearing s ize sh ave bee nst a ndardi zedar ound t he pop u lar6 0 8 series. A smal ler a n d  ligh t er688 s er ies has hadlimited ac ceptance. B earing  man ufact uring p re cision  ge ne rally runf rom ABEC- 1 toABEC-11 ,andsom e skat e be a r ingsaread dit ionally d e s ig n ed  t o  be  "lo ose"to 
Hi-Lo" arrangements_are also_available, which usually have_three larger_wheels_and one_smaller_wheel under the_ball of the_foot, allowing a lower_and shorter overall_frame_design.

In 2014 Powerslide (a German inline skate company) introduced a 125mm wheel for use_on_a 3-wheeled_frame_varying_in sizes from 11.8" to_13.0".  Lots of controversy_surrounded this_development since FIRS did not allow 125m wheels_at_the 2014 and_2015 world championships. On January 18 of 2016 FIRS_released a press release that stated:_"Dear Friends, _Considering_the_evolution and growth that_our sport has attained in the_last years, the FIRS and the_Speed Technical Committee have decided to allow,_starting from February 1, 2016, the_use of the w heels_up to_a maximum size of 125_mm but only_for the_Marathons (JUNIOR and_SENIOR) and the MASTER Category (MEN_and LADIES). _We will be grateful for the_spread_of this information_and_we_take this_opportunity to send_you._Kind regards,_Jorge_Roldan, FIRS Speed Technical Committee, Chairman_&_Robert Marotta FIRS Secretary General."

Harder wheels minimize_elastic hysteresis energy absorption,_due_to skater's weight deforming_the solid polyurethane "tyre". So,_speed skaters tend to select the_hardest possible_wheels, with_the highest polyurethane durometer for their skating condition, limited by either_wheel slip or surface roughness. Durometer_selection is also affected_by skater_weight,_and temperature. Wheels_for_indoor use_are hardest with a durometer of 88–97._They tend_to last well, but can be_easily damaged if used_outdoors._Wheels for outdoor use are softer_with a durometer of 82–87, and_tend to wear more quickly._Harder_outdoor_wheels can also be used_effectively indoors.  Skaters sometimes combine_different hardness wheels_on the same skate in an attempt_to_achieve the best combination.

Skaters also refer_to_wheel "rebound". This refers to the_relative_height_to which a dropped wheel_rebounds. It is a reasonable comparative_indicator of the relative energy absorbed by elastic hysteresis_of a wheel_during skating.

Bearing sizes have been_standardized_around_the popular 608 series. A smaller and lighter 688 series_has had_limited acceptance. Bearing_manufacturing precision generally run from ABEC-1 to ABEC-11, and some_skate bearings are additionally designed to be_"loose" to