Aura XR4 2026

~~Colour variants~~

Tripple butted alloy frame with fully Integrated Cable Routing included head setLightweight full carbon fork with 6 threaded bossesSHIMANO CUES components, 20 speedSHIMANO CUES BR-UR6030 hydraulic disc brakesPANARACER Gravel King SK Sport 700 x 38C tiresPROMAX ergoshaped gravel handlebarsHow to choose a bike

~~Buy now~~special price 34 990 Kč

original price ~~41 990 Kč~~

Technical specification

Size	50, 52, 54, 56, 58 cm
Frame	triple butted alloy (max. tyre size 45 mm)
Front fork	AUTHOR carbon, 1.5" tapered
Head parts	FSA No. 69 / 56 / SRS / Center 1,5"
Chain Wheel	SHIMANO Cues 6040-2, 46-32 teeth, 172,5/175 mm cranks
BBParts	SHIMANO BB-RS501, BB unit
Front derailleur	SHIMANO Cues 6030
Rear derailleur	SHIMANO Cues 6020
Shifters	SHIMANO Cues 6030 (20)
Free wheel	SHIMANO CS-LG400-10, 11-39 teeth (10)
Chain	KMC XGlide
Hubs	QUANDO Road Disc, 12 x 100 mm thru front axle, 12 x 142 mm thru rear axle, 32 holes
Brakes	SHIMANO Cues 6030, disc hydraulic (160 mm rotors)

Brakes levers	SHIMANO Cues 6030
Rims	AUTHOR Oxygen TRC, 32 holes
Spokes	black stainless steel 2.0 mm
Tires	PANARACER Gravel King SK Sport, 700 x 38c (max. tyre size 45 mm)
Handlebar	PROMAX, 420/440/460 mm
Grips/Bar tapes	AUTHOR suede / gel
Stem	AUTHOR alloy
Seat post	AUTHOR alloy (27.2)
Seat clamp	AUTHOR (31.8)
Saddle	AUTHOR Guru
Speed	20
Weight	10,9 kg / 54 cm

Geometry and sizes

Size	500	520	540	560	580
Min. figure ~~[cm]~~	160	168	176	183	190
Max. figure ~~[cm]~~	170	178	185	193	205
S/T c-t ~~[mm]~~	500	520	540	560	580
S/T c-c ~~[mm]~~	460	480	500	520	540
T/T h ~~[mm]~~	530	550	570	590	610
T/T a ~~[mm]~~	0	0	0	0	0
H/T ~~[mm]~~	135	150	165	180	200
C/S ~~[mm]~~	435	435	435	435	435
W/B ~~[mm]~~	1026	1037	1052	1062	1071
S/T ang. ~~[°]~~	74.5	74	73.5	73	72.5
H/T ang. ~~[°]~~	70.5	71	71	71.5	72
F/L ~~[mm]~~	408	408	408	408	408
B/B drop ~~[mm]~~	70	70	69	68	68
B/B width ~~[mm]~~	68	68	68	68	68
Reach ~~[mm]~~	371	381	392	402	409
Stack ~~[mm]~~	572	588	601	617	638
F/R ~~[mm]~~	45	45	45	45	45
Handlebars ~~[mm]~~	0	0	0	0	0
Stem ~~[mm]~~	0	0	0	0	0
Cranks ~~[mm]~~	0	0	0	0	0

maxmin

~~Choose the height of the character by moving the pointer on the scale.~~

The recommended size and stature are just indicative. It is recommended to always consult your choice with the dealer.

S/T c-t - seat tube (center-top), length of the seat tube from the middle of BB parts to its peak
S/T c-c - seat tube (center-center), length of the seat tube from the middle of BB parts to an axle of the upper tube
T/T h - top tube horizontal, horizontal lenght of the upper tube
T/T a - top tube actual, real lenght of the upper tube
H/T - head tube, head tube lenght
C/S - chain stay, chain brace lenght
W/B - wheel base, wheelbase (front and rear axle lenght)
S/T ang. - seat tube angel, angle between the seat tube axis and an imaginary line connecting the axes of the front and rear wheel
H/T ang. - head tube angel, angle between the head tube axis and an imaginary line connecting axes of the front and rear wheels
F/L - fork length, fork length from the head parts bottom to the middle of the front wheel
B/B drop - bottom bracked drop, lenght between an imaginary line connecting wheels centers and BB parts, measured from BB parts
F/R - fork rake, distances between the head tube axis and fork axis measured at center of the front wheel, so-called. off set

Availability

	Colour variant	Size	In stores	Purchase	City	Contacts on seller	Model code
		50	11 stores				42972302
	▪ Bike Servis FRODL		order	order now	Čáslav	603 510 347, mpbike@seznam.cz	map
	▪ SPORT CYKLO s.r.o.		order	order now	Holešov	603 373 886, sportcyklo@gmail.com	map
	▪ CYKLOSPORT H&F		order	order now	Opava 1	777 330 072, info@cyklosporthf.cz	map
	▪ KOLA ŠILHAVÝ s.r.o.		order	order now	Plzeň	602 495 439, silhavy@silhavy-ramala.cz	map
	▪ Ramala s.r.o.		order	order now	Plzeň	377 322 435, plzen@ramala.cz	map
	▪ Velo Fiala		order	order now	Praha 6	725 729 111, tomas@velofiala.cz	map
	▪ CykloCentrum ESHOP		order	order now	Praha 7	725 085 309, info@cyklocentrum.cz	map
	▪ Viavelo		order	order now	Praha 8 - Kobylisy	775 657 711, viavelo@viavelo.cz	map
	▪ Sedláček s.r.o.		order	order now	Příbram 1	318 621 473, info@cyklosport-sedlacek.cz	map
	▪ Jízdní kola Rezek - Rezková		order	order now	Rakovník	313 517 417, jizdnikola.rezek@tiscali.cz	map
	▪ Pavel Brabec		in stock	buy now	Rumburk	602 112 875, brabec.pavel@gmail.com	map
	⟲ In other stores		in 2 days				dealers
		52	12 stores				42972303
	▪ Bike Servis FRODL		in stock	buy now	Čáslav	603 510 347, mpbike@seznam.cz	map
	▪ Bike Sport		in stock	buy now	Chrudim	608 430 492, info@bike-sport-shop.cz	map
	▪ SPORT CYKLO s.r.o.		order	order now	Holešov	603 373 886, sportcyklo@gmail.com	map
	▪ CYKLOSPORT H&F		order	order now	Opava 1	777 330 072, info@cyklosporthf.cz	map
	▪ KOLA ŠILHAVÝ s.r.o.		order	order now	Plzeň	602 495 439, silhavy@silhavy-ramala.cz	map
	▪ Ramala s.r.o.		order	order now	Plzeň	377 322 435, plzen@ramala.cz	map
	▪ Velo Fiala		order	order now	Praha 6	725 729 111, tomas@velofiala.cz	map
	▪ CykloCentrum ESHOP		order	order now	Praha 7	725 085 309, info@cyklocentrum.cz	map
	▪ Viavelo		order	order now	Praha 8 - Kobylisy	775 657 711, viavelo@viavelo.cz	map
	▪ Sedláček s.r.o.		order	order now	Příbram 1	318 621 473, info@cyklosport-sedlacek.cz	map
	▪ Jízdní kola Rezek - Rezková		order	order now	Rakovník	313 517 417, jizdnikola.rezek@tiscali.cz	map
	▪ Pavel Brabec		in stock	buy now	Rumburk	602 112 875, brabec.pavel@gmail.com	map
	⟲ In other stores		in 2 days				dealers
		54	13 stores				42972304
	▪ Bike Servis FRODL		order	order now	Čáslav	603 510 347, mpbike@seznam.cz	map
	▪ Bike Sport		in stock	buy now	Chrudim	608 430 492, info@bike-sport-shop.cz	map
	▪ SPORT CYKLO s.r.o.		order	order now	Holešov	603 373 886, sportcyklo@gmail.com	map
	▪ VISO BIKE		in stock	buy now	Kostelec nad Orlicí	494 321 123, info@visobike.cz	map
	▪ CYKLOSPORT H&F		order	order now	Opava 1	777 330 072, info@cyklosporthf.cz	map
	▪ Ramala s.r.o.		order	order now	Plzeň	377 322 435, plzen@ramala.cz	map
	▪ KOLA ŠILHAVÝ s.r.o.		in stock	buy now	Plzeň	602 495 439, silhavy@silhavy-ramala.cz	map
	▪ Velo Fiala		order	order now	Praha 6	725 729 111, tomas@velofiala.cz	map
	▪ CykloCentrum ESHOP		order	order now	Praha 7	725 085 309, info@cyklocentrum.cz	map
	▪ Viavelo		order	order now	Praha 8 - Kobylisy	775 657 711, viavelo@viavelo.cz	map
	▪ Sedláček s.r.o.		order	order now	Příbram 1	318 621 473, info@cyklosport-sedlacek.cz	map
	▪ Jízdní kola Rezek - Rezková		order	order now	Rakovník	313 517 417, jizdnikola.rezek@tiscali.cz	map
	▪ Pavel Brabec		in stock	buy now	Rumburk	602 112 875, brabec.pavel@gmail.com	map
	⟲ In other stores		in 2 days				dealers
		56	14 stores				42972305
	▪ Bike Servis FRODL		order	order now	Čáslav	603 510 347, mpbike@seznam.cz	map
	▪ Bike Sport		in stock	buy now	Chrudim	608 430 492, info@bike-sport-shop.cz	map
	▪ SPORT CYKLO s.r.o.		order	order now	Holešov	603 373 886, sportcyklo@gmail.com	map
	▪ Oldřich Tesařík		in stock	buy now	Horka nad Moravou	603 744 424, oldrich.t@gmail.com	map
	▪ CEMOS		in stock	buy now	Kaznějov	777 668 339, obchod@cemos.cz	map
	▪ CYKLOSPORT H&F		in stock	buy now	Opava 1	777 330 072, info@cyklosporthf.cz	map
	▪ Ramala s.r.o.		order	order now	Plzeň	377 322 435, plzen@ramala.cz	map
	▪ KOLA ŠILHAVÝ s.r.o.		in stock	buy now	Plzeň	602 495 439, silhavy@silhavy-ramala.cz	map
	▪ Velo Fiala		order	order now	Praha 6	725 729 111, tomas@velofiala.cz	map
	▪ CykloCentrum ESHOP		order	order now	Praha 7	725 085 309, info@cyklocentrum.cz	map
	▪ Viavelo		order	order now	Praha 8 - Kobylisy	775 657 711, viavelo@viavelo.cz	map
	▪ Sedláček s.r.o.		order	order now	Příbram 1	318 621 473, info@cyklosport-sedlacek.cz	map
	▪ Jízdní kola Rezek - Rezková		order	order now	Rakovník	313 517 417, jizdnikola.rezek@tiscali.cz	map
	▪ Pavel Brabec		in stock	buy now	Rumburk	602 112 875, brabec.pavel@gmail.com	map
	⟲ In other stores		in 2 days				dealers
		58	12 stores				42972306
	▪ Bike Servis FRODL		order	order now	Čáslav	603 510 347, mpbike@seznam.cz	map
	▪ SPORT CYKLO s.r.o.		order	order now	Holešov	603 373 886, sportcyklo@gmail.com	map
	▪ Cyklo sport Stratílek		in stock	buy now	Litomyšl	606 613 399, cyklo@stratilek.cz	map
	▪ CYKLOSPORT H&F		order	order now	Opava 1	777 330 072, info@cyklosporthf.cz	map
	▪ Ramala s.r.o.		order	order now	Plzeň	377 322 435, plzen@ramala.cz	map
	▪ KOLA ŠILHAVÝ s.r.o.		in stock	buy now	Plzeň	602 495 439, silhavy@silhavy-ramala.cz	map
	▪ Velo Fiala		order	order now	Praha 6	725 729 111, tomas@velofiala.cz	map
	▪ CykloCentrum ESHOP		order	order now	Praha 7	725 085 309, info@cyklocentrum.cz	map
	▪ Viavelo		order	order now	Praha 8 - Kobylisy	775 657 711, viavelo@viavelo.cz	map
	▪ Sedláček s.r.o.		order	order now	Příbram 1	318 621 473, info@cyklosport-sedlacek.cz	map
	▪ Jízdní kola Rezek - Rezková		order	order now	Rakovník	313 517 417, jizdnikola.rezek@tiscali.cz	map
	▪ Pavel Brabec		in stock	buy now	Rumburk	602 112 875, brabec.pavel@gmail.com	map
	⟲ In other stores		in 2 days				dealers
Poznámka: Stav dostupnosti kola se aktualizuje 1× denně v ranních hodinách.

additional accessories

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1/4

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300 Kč ~~475 Kč~~ R255 Tank Bag MPPThe AUTHOR Tank Bag MPP ensures your camera is at hand in any situation. It provides easy, hassle-fr ... more »

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350 Kč ~~499 Kč~~ R260 ProLongThe Author saddle bag A-R260 ProLong is the universal bag with the one main compartment and one flat ... more »

1/4

399 KčR270The Author saddle bag A-R270 16" is the universal bag with the one main compartment and one flat poc ... more »

1/5

250 Kč ~~399 Kč~~ R290 Energy BagNYLON 420DThe AUTHOR A-R290 Energy Bag ensures your necessary items are at hand in any situation. It provides ... more »

1/5

399 KčCargoCage WP 9 l9 l • 160 g • waterproof fabricThe AUTHOR CargoCage 9l is designed to fit the side cargo cages mainly anyway can be fixed on rear c ... more »

1/6

750 Kč ~~895 Kč~~ S3152 SuMo X9 The AUTHOR SuMo big seat bag for big trips. Take it on the every route - easy strong fixation for ... more »

AUTHOR Hand pump AAP Fatty X23 AL/Composite

1/4

350 KčFatty X23 AL/CompositeAlloy • 120 psi • 129 g • The AUTHOR Fatty X23 AL mini pump provides fast and simple tire inflation with a maximum pressure of ... more »

1/2

399 KčAKS-530 RSAlloy kick stand designed for direct rear fork down tube fixation (tube profile 22 - 32 mm), recomen ... more »

1/6

595 KčQUANTUM 750 lm L-Run USB AlloyCREE XP-G3 LED 750 lm • LED battery indicator • Safe Ride Home Mode • USB-C • AlloyThe AUTHOR QUANTUM 750 lm L-Run is a USB rechargeable headlight with a CREE XP-G3 LED 750 lm output. ... more »

AUTHOR Head light PROXIMA 1000 lm / HB 22-38 mm USB Alloy

1/6

1 095 KčPROXIMA 1000 lm / HB 22-38 mm USB AlloyCREE XP-L2 LED 1000 lm • Powerbank • LCD Battery indicator • Safe Ride Home Mode • USB-C • AlloyAUTHOR PROXIMA 1000 lm with powerbank function is a more than bike light. This rechargeable light is ... more »

1/3

599 Kč ~~895 Kč~~ ACR-12-Alu570 g • top place 330x85-115 mm • A tough rear rack AUTHOR ACR-12-Alloy. Equipped with adjustable legs to fit most 24” to 29” whe ... more »

1/3

695 KčACR-16-Alloy566 g • top place 360 x 105 mm • A tough rear rack AUTHOR ACR-16-Alu. Equipped with adjustable legs to fit most 24” to 29” wheel ... more »

1/4

795 KčACR-18-Alloy653 g • top place 310x70 mm • A tough rear rack AUTHOR ACR-18-Alloy. Equipped with adjustable legs to fit most 24” to 29” whe ... more »

1/7

145 Kč ~~199 Kč~~ X-Bow CrossThe mudguard AUTHOR X-Bow Cross with fast and easy clipping system on seat tube will make the lazies ... more »

1/2

150 Kč ~~199 Kč~~ X-Flap SeatThe mudguard AUTHOR X-Flap with fast and easy clipping system on saddle rails will make the laziest ... more »

1/6

695 KčACR-F05-AluALLOY • 163 g • The AUTHOR CARGO F05 is the perfect combination of bottle cage and bicycle rack. Designed to carry b ... more »

1/2

145 Kč ~~199 Kč~~ X-Mudy CrossFront mudguard AUTHOR, for down tube mounting, fabric plastic. more »

Aura XR4 2026

Technical specification

Geometry and sizes

Availability

Product options

additional accessories