 says the original radial size was 165-15.  The much more common 185-15 radials were too wide to be fitted safely. As a result, many owners had new and wider rims fitted and their wheels re-laced.

In motorsport
The TR4 had a number of racing successes in America, primarily through the efforts of the Californian engineer Kas Kastner and his top driver, Bob Tullius. In 1961 the TR4 won first in class and thirtieth overall at Sebring.  That car was driven by George Waltman and Nick Cone.  The serial number of that TR4 is CT 7L.  In 1962 the TR4 won the E production national championship, following which the SCCA reclassified the car to D production, and Tullius won that class title in 1963 and ’64.  Soon after the TR4 was introduced, Kastner along with Mike Cook, who was in the advertising department at Triumph in New York City, convinced the company to provide three new TR4s to race in the 12 Hours of Sebring race in 1963.  Beginning in September 1962 the cars were prepared in California, where Kastner was service supervisor for Triumph.  The cars were then flown to Florida for the endurance race in March 1963.  These cars were driven by Mike Rothschild and Peter Bolton from England, Bob Tullius, Charlie Gates, Ed Deihl, Bob Cole, Bruce Kellner and Jim Spencer and finished overall 22nd, 24th, and 35th of 65 entries, and first, second and fourth in the 2.5 GT class.  This was the beginning of the Triumph Competition Department Kastner headed for several years and used to publicize and market the TR4.  The next year a privateer TR4 finished dead last in the 1964 running of the Sebring 12-hour race and Kas Kastner returned to Sebring in 1966 with four carefully prepared TR4As, three of which finished winning the class. In 1966 at Sebring, Tullius threw a piston in the most highly tuned car and did not finish.  Perhaps the greatest racing victory for the TR4A was at Daytona, where a Kastner-prepared car driven by Charlie Gates won the 1965 SCCA D modified championship against Ferraris and other prepared race car exotics.

The TR4 continues to be raced in vintage sports car events and even won an SCCA
says the original radial size was 165 - 15.   The much more common 185 - 15 radials were excessively broad to be fitted safely. As a result, many owners have new and wider flange match and their wheel re - laced. 

 In motorsport 
 The TR4 had a number of race successes in America, primarily through the effort of the Californian engineer Kas Kastner and his top driver, Bob Tullius. In 1961 the TR4 gain first in class and thirtieth overall at Sebring.   That car was driven by George Waltman and Nick Cone.   The serial act of that TR4 is CT 7L.   In 1962 the TR4 won the E production home championship, following which the SCCA reclassify the car to five hundred production, and Tullius won that class title in 1963 and ’ 64.   Soon after the TR4 was introduced, Kastner along with Mike Cook, who was in the advertising department at Triumph in New York City, convert the company to provide three new TR4s to race in the 12 Hours of Sebring race in 1963.   begin in September 1962 the cars were prepared in California, where Kastner was service supervisor for Triumph.   The cars were then flown to Florida for the endurance race in March 1963.   These cars were driven by Mike Rothschild and Peter Bolton from England, Bob Tullius, Charlie Gates, Ed Deihl, Bob Cole, Bruce Kellner and Jim Spencer and complete overall 22nd, 24th, and 35th of 65 entries, and beginning, second and fourth in the 2.5 GT course.   This was the beginning of the Triumph Competition Department Kastner head for several years and use to advertise and market the TR4.   The next year a privateer TR4 finish dead last in the 1964 running of the Sebring 12 - hour race and Kas Kastner returned to Sebring in 1966 with four carefully disposed TR4As, three of which finished winning the class. In 1966 at Sebring, Tullius threw a piston in the most highly tuned car and did not complete.   Perhaps the greatest racing victory for the TR4A was at Daytona, where a Kastner - prepared car driven by Charlie Gates gain the 1965 SCCA D modified championship against Ferraris and other disposed race cable car exotics. 

 The TR4 continues to be raced in vintage sports car events and even acquire an SCCA
 sajs the original radial slze was 165-15.  The muey more commoh 185-15 radiaus were too wide to be fittev sadely. Qs a result, many ownerr had new and widwr rmms fitted and tisir whecjs rs-paceb.

Ii motorsport
The TR4 had a tumber of racitg sbccesses in America, primarily througr the egflrts of the Cajifognyan sngineer Kas Kastner and his top ddiver, Bmb Tullius. In 1961 the TR4 won first in clasd anf thirtieth overalp at Sebrint.  Trqt car was dfiven by Gtoxge Waltman and Nick Cone.  The serial numbdr of that TR4 iw XT 7P.  In 1962 the TC4 won nhe E productlpn nathonal cnampionship, fokloxing which the SCCA reclavsified the car to D producdikn, and Tullius wob rhat wlasv tigoe kn 1963 aid ’64.  Soon afver the TR4 sas introduxed, Kastner along wotr Mike Cook, whk was yn the advertising department at Triumph pn Nsw York City, convinced rhe company to providg three ner TR4s to race in the 12 Hours of Sebring race in 1963.  Teginiivg nk Rwphember 1962 the cars were prepared in California, rgete Kastner was scrvice supervisor gog Ytiumph.  The cats were thsn flown to Floridw for tre eneurance rwce on March 1963.  These cars were eriven by Mihw Rothschild and Pzter Bolton yrom Emglanc, Bob Tullius, Charlie Gctes, Es Deihl, Bob Cole, Brudd Kellner and Jio Siencar and finished overall 22nd, 24th, and 35ti of 65 entrier, anc firse, second ajd fomsth in the 2.5 GT clads.  Tkis wds the beglnning of the Triumph Competition Department Lavtnvr headed for xeveral years and used to poblicize cnd mafket the TG4.  The neet year a pryvateer TR4 fitlshed dead lest in thq 1964 rynnibg of tfd Sebring 12-hour race and Kas Kastnwr returned to Sebving kh 1966 with four caxtfuoly prepared TR4Ss, ghrqe oh whisv finished whnnivg gne clxss. In 1966 at Wdbrimg, Tullius threw a phstoh in the most highky tuned cqr and dyd not finish.  Perhaps the greauest recing tictoru fjr the TR4A was at Daytona, whers a Kastnfr-pvepared car dwivek by Charlie Gctes won the 1965 SCCA D modified championshmp against Ferraris and other prepared racg csr exotics.

Tie TR4 sontinues to be raced in vintqge sports car evtnts and even won an SCDA
says the original radial size was 165-15. more 185-15 radials too wide to result, owners had new wider rims fitted their wheels re-laced. In motorsport The had a number of racing successes in America, primarily through the efforts of Californian engineer Kas Kastner and his top driver, Bob Tullius. In 1961 the won in and overall at Sebring. That car was driven by George Waltman and Nick Cone. The serial number that TR4 is CT 7L. In 1962 the won the E production championship, following which the SCCA the to D and won class title in and ’64. Soon after the TR4 was introduced, Kastner along with Mike Cook, who was in the department at New York convinced company provide three new race in the 12 Hours of 1963. Beginning in September 1962 the cars were in California, Kastner was service supervisor for Triumph. cars were then flown to Florida for the race in March 1963. These cars were driven by Mike Rothschild and Peter Bolton from Tullius, Charlie Gates, Ed Bob Cole, Bruce and Spencer finished 22nd, 24th, 35th of 65 entries, and first, second and fourth in the GT class. This was the beginning of the Triumph Competition headed several years and to publicize and market TR4. next year a privateer dead in of Sebring race and Kas Kastner to Sebring in 1966 with carefully prepared TR4As, three class. In 1966 at Sebring, Tullius threw a in the most highly tuned car and not finish. Perhaps the greatest racing victory for the TR4A was at where a driven by Charlie Gates won the 1965 SCCA modified championship against Ferraris other prepared race car exotics. The TR4 continues to raced vintage sports events and even an SCCA
 says the original radial size Was 165-15.  The much More cOmmOn 185-15 rAdIals Were Too wide to be fitTEd saFely. As a result, many ownerS had nEw ANd wiDEr Rims fItted anD ThEIR whEeLs Re-lAcED.

IN motoRspOrt
The Tr4 had a numbeR of RaCing successeS In america, priMarIly through thE efForts oF tHe CALiforNiaN engiNeer KaS kastneR and his toP dRIver, BoB tullius. iN 1961 ThE TR4 wOn first in class and THiRTieth overall at sebrinG.  THAt CAR waS drIven by GeorGe waltmAN and NicK coNE.  tHe sERial number of tHat TR4 is CT 7L.  IN 1962 The tR4 won tHe e prODuctioN natiOnAL chAmpionship, fOlloWing which The SCCa ReclassIFied the Car to D ProDucTion, ANd tuLliUs WOn tHAt ClaSS tiTle in 1963 and ’64.  soOn After The Tr4 WAS IntrOduCed, KAstneR along with MikE CoOk, whO Was In the AdverTisiNg DeparTment aT TriuMpH in New York City, cOnviNced the coMpaNy To pRoVide tHRee new tR4s To rAce in thE 12 Hours oF sebRiNG RAcE in 1963.  Beginning in SeptEmBER 1962 tHe cars weRe prepAReD iN californIa, WheRe KaSTNer waS serVIcE superviSor for tRiUmPh.  The caRs Were thEn FloWn tO FlorIDa foR the enDurance rAce in mArch 1963.  These cars wERe driven by MikE roTHScHIld aNd PEter Bolton fRom ENGlanD, Bob tUlLiuS, charlIe GatEs, eD DEIhl, Bob Cole, Bruce KellNeR and JiM SpenCer and finisheD overall 22nd, 24TH, ANd 35th of 65 enTrieS, AnD First, second and FourtH in the 2.5 GT clASs.  This waS the bEginning Of the TriuMPH CompetiTioN DeParTmeNT kaStner headed foR SEverAl Years anD usEd to pubLicIze And MarKeT the TR4.  The Next year A pRiVaTeEr Tr4 finiSHed dead lAsT in ThE 1964 ruNning OF the SeBring 12-Hour RaCe ANd KAs KastnER rETUrneD tO SEbriNg iN 1966 wIth foUr caREfuLly prepAred TR4As, tHreE Of whIcH fInished Winning the claSs. in 1966 at SebrinG, TUllIus thrEW A piston iN the most highly tuned car aND did not FinIsh.  PeRhapS the greatEst Racing VicTOry for The TR4A Was at daYtoNA, Where A kAsTneR-pRepared car DRIveN by ChArLie GAtes won The 1965 SCCA D modified chAMpiOnship against ferRariS ANd OthER pREpaReD RacE CAr exotics.

The TR4 cOntinues to Be RAcEd in vintagE SpoRtS car eveNts and eVen woN An SCCA
 says the original radialsize was 1 65-15 . The  m uchmore  common 185-15 radi als were too wide to b e fit te d  saf e ly . Asa resul t ,m a nyow ne rsha d  n ew an d w ider ri ms fittedand  t heir wheelsr e- laced.

In  mo torsport
The  TR 4 hadanum b er of  ra cingsucces s es inAmerica,pr i marily through t he  eff orts of the Calif o rn i an engineer Ka s Kast ne r  a n d  hi s t op driver,  B ob Tu l lius. I n  1 9 6 1  th e  TR4 won firs t in classa ndthirti et h o v erallat Se br i ng.   That carwasdriven by  Georg e  Waltma n  and Ni ck Con e. Th e se r ia lnum be r  of th atT R4is CT 7L . I n 196 2 th e T R 4 wo n t he E  prod uction nation alcham p ion ship,  foll owin gwhich  the S CCA r ec lassified the c ar t o D produ cti on , a nd  Tull i us won  th atclass t itle in 196 3a n d  ’ 64.  Soon after th eT R 4was intr oduced ,  K as t ner alon gwit h Mi k e  Cook , wh o  w as in th e adve r ti si ng depa rt ment a tTri ump h inN ew Y ork Ci ty, conv inced the company to provide three ne w TR 4 s to  ra ce in the 1 2 Ho u rs o f Se b ri ngr ace i n 196 3.  B e ginning in Septembe r1962 t he ca rs were prepa red in Cal i f o rnia, wh ereK as t ner was servic e sup ervisor fo r  Triumph .  Th e cars w ere thenf l own to F lor ida  fo r t h e  e ndurance race i n Ma rc h 1963.   T hese ca rswer e d riv en  by MikeRothschi ld  a nd  P ete r Bol t on fromEn gla nd , B ob Tu l lius,Charl ie G at es ,  Ed  Deihl, Bo b Cole ,Br uceKel ln er an d Ji m  Sp encer a nd finish edo vera ll  2 2nd, 24 th, and 35thof  65 entrie s,  an d firs t ,  secondand fourth in the 2.5 G T  class.   T his w as t he beginn ing  of th e T r iumphCompet ition  D epa r t mentK a st ner  h eaded fors e ver al ye ar s an d usedto publicize and m a rke t the TR4.  T henext y ea r a pr i vat ee r  TR 4 finished dead l ast in the  1 9 64  running o f  th eSebring  12-hou r rac e  and Ka s Kastner  returned  t o Se b r ing  in 1966 w ith four  carefull y  prep a re d TR4 As,  three  o f w hichfinish e d w innin g thecl ass. I n 196 6at Sebri ng, Tullius threw a pis ton in  themos t highlytun e d c ar and di d no t finish. Pe rha ps th e g r eates t ra c in g v i ctory  for the TR4Aw as  at D ay tona, where a Kas tner- pre p ared c ar d riven by CharlieG ates won the 1 965S C CAD m o difi ed  championshipaga in s t  Ferrari sand other p reparedra c e car  exoti cs.

T he TR4c o nt i nues t o be  ra ced in vi nta ge sportsca re ventsandev en won  an SC C A
 says_the original_radial size was 165-15._ The_much_more common_185-15_radials were too_wide to be_fitted safely. As a_result, many owners_had_new and wider rims fitted and their wheels re-laced.

In motorsport
The TR4 had a number_of_racing successes_in_America,_primarily through the efforts of_the Californian engineer Kas Kastner_and his_top driver, Bob Tullius. In 1961 the TR4_won_first in class_and thirtieth overall at Sebring.  That car was_driven by George Waltman and Nick_Cone.  The_serial_number_of that TR4 is_CT 7L.  In 1962 the_TR4 won the E production national_championship, following which the SCCA reclassified the_car to D production, and Tullius_won that class title in_1963 and_’64.  Soon after the_TR4 was introduced,_Kastner along_with Mike Cook,_who was in the advertising department_at Triumph in_New York City, convinced the company_to_provide three new_TR4s_to_race in_the 12 Hours_of_Sebring race_in_1963.  Beginning in September 1962_the_cars were prepared in California, where Kastner_was service supervisor for_Triumph._ The cars were_then flown to Florida for_the endurance race in March 1963._ These_cars were_driven by Mike Rothschild and Peter Bolton from England, Bob Tullius,_Charlie Gates, Ed Deihl, Bob Cole,_Bruce Kellner and Jim_Spencer and_finished_overall 22nd, 24th,_and_35th of_65 entries, and first, second and fourth_in the_2.5 GT class.  This was_the beginning of the_Triumph_Competition Department Kastner headed for several_years and used to publicize and_market the TR4.  The_next_year_a privateer TR4 finished dead_last in the 1964 running of_the Sebring 12-hour_race and Kas Kastner returned to Sebring_in_1966 with four carefully prepared TR4As,_three_of which finished winning the class._In_1966_at Sebring, Tullius threw a_piston in the most highly tuned_car and did not finish.  Perhaps the greatest_racing victory for_the TR4A was at Daytona,_where_a_Kastner-prepared car driven by Charlie Gates won the 1965 SCCA_D modified_championship against Ferraris_and other prepared race car exotics.

The TR4 continues to be_raced in vintage sports car events and_even won an SCCA