184:
175:
25:
1072:
54:
1062:
208:
231:
251:
standard. The external threads at the tip of both "threaded" and "unthreaded" Presta valves are 5V2 (#12-24TPI), which measures out to 5.2×1.058 mm, the same thread size as the tip of a Dunlop valve. The external threads on the main body of "threaded" Presta valves are 6V1, which measures 6×0.80
198:
The standard Presta valve has an external thread. An adapter can be fitted onto this external thread to permit the Presta valve to be connected to a pump with a
Schrader chuck. The same adapter, because of a coincidence of thread sizes, may be able to convert a Schrader pump into one that can connect
144:
The outer valve stem is manufactured in various lengths to cater for the different depths of the wheel or rim. It is recommended the valve stem is to be at least 10 mm longer than the rim is deep to allow adequate room for the bicycle pump to be attached. It has a narrower diameter of 6 mm
161:
The nut must be unscrewed to permit airflow in either direction. The screw remains captive on the valve body even when unscrewed fully; it is tightened again after the tire is inflated and the pump removed. The valve cap protects the valve body, keeps dirt and mud out of the mechanism, and also
165:
The holes in rims sized for Presta valves can be enlarged to accommodate the wider
Schrader valves, which can structurally weaken the rim. Conversely, when a Presta valve is fitted into the larger Schrader rim hole, grommets or reducers are sometimes used to take up the extra space.
153:
valves, measuring 8 mm (0.31 in). The weakest point of a bicycle rim is usually the hole for the valve stem. The smaller hole for a Presta valve makes it possible to have extremely narrow wheels while maintaining sufficient strength in the wheel.
238:
Valve extenders can be used to lengthen shorter Presta valves to accommodate deeper and thicker rims, such as those on aerodynamic race wheels. There are two variants of valve extenders depending on whether the Presta core is removable.
157:
The air pressure in an inflated tire holds the inner valve body shut. A small screw and captive nut on the top of the valve body permits the valve to be screwed shut and ensures that it remains tightly closed.
315:
1004:
410:
359:
903:
499:
428:
893:
162:
prevents the valve from damaging the tube when it is rolled for storage, but is not necessary to prevent pressure loss.
1111:
1014:
534:
1116:
460:
230:
381:
100:
and an inner valve body. A lock nut to secure the stem at the wheel rim and a valve cap may also be present.
855:
812:
742:
1106:
951:
822:
817:
222:
setup to add sealant through the valve. Sealant may also be added by pouring it directly into the tire.
802:
113:
782:
1096:
908:
544:
492:
1061:
946:
777:
406:
772:
649:
248:
1065:
1024:
996:
938:
878:
870:
837:
827:
737:
724:
669:
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589:
569:
516:
133:
807:
767:
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752:
692:
634:
355:
183:
24:
1101:
1075:
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712:
604:
485:
276:
174:
150:
1090:
883:
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747:
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43:
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1009:
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424:
281:
261:
146:
207:
53:
1037:
961:
913:
898:
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584:
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234:
A valve extender (black) is fitted between valve stem (brass) and core (silver).
31:
1042:
860:
787:
697:
687:
654:
271:
266:
97:
93:
83:
302:
GB189709082A Improvements in Pumps for
Inflating Pneumatic Tyres and the like
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639:
629:
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559:
682:
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956:
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90:
215:
Unlike
Schrader valves, not all Presta valves have removable cores.
554:
316:"Improvements in Pumps for Inflating Pneumatic Tyres and the like"
229:
206:
35:
96:
and is commonly used on tubeless setups. It consists of an outer
1047:
609:
508:
39:
481:
218:
Presta valves with removable cores may be used with a tube or
477:
1023:
995:
937:
869:
836:
723:
668:
515:
247:The valve threads for Presta valves follow the
192:Two views of a Presta to Schrader valve adapter
447:
445:
493:
453:"MARYLAND METRICS -- THREAD DATA CHARTS (26)"
8:
1005:European Tyre and Rim Technical Organisation
500:
486:
478:
349:
347:
304:. London: G. F. Redfern & Co. 1897.
293:
30:A Presta valve shown in context of the
199:to flexible adapters of either kind.
7:
356:"Subject: Presta vs Schrader valves"
1048:Uniform Tire Quality Grading (UTQG)
382:"How to Use Tubeless Tire Sealant"
14:
380:Missel, Riley (2 November 2020).
340:. Julian von Heyl (private site).
1071:
1070:
1060:
413:from the original on 2017-04-26.
182:
173:
136:for "fast, hurry, immediately".
116:and is often referred to as the
52:
23:
904:Tire-pressure monitoring system
463:from the original on 2016-11-13
431:from the original on 2016-11-10
362:from the original on 2009-07-21
1:
894:Central Tire Inflation System
145:(0.24 in), compared to
120:. Today it is also known as
1015:Tire Science and Technology
535:Low rolling resistance tire
1133:
112:was invented by Frenchman
1056:
407:"Valve Extenders, How To"
322:. Europäisches Patentamt.
211:Removed Presta valve core
856:Slip (vehicle dynamics)
813:Lateral Force Variation
763:Pacejka's Magic Formula
743:Cold inflation pressure
86:commonly found on high
952:List of tire companies
823:Traction (engineering)
818:Radial Force Variation
354:Brandt, Jobst (2002).
235:
212:
803:Tire load sensitivity
233:
210:
203:Removable valve cores
59:A closed Presta valve
783:Self aligning torque
909:Tire-pressure gauge
545:Michelin PAX System
1112:1897 introductions
947:Tire manufacturing
778:Rolling resistance
236:
213:
114:Etienne Sclaverand
16:Bicycle tube valve
1117:French inventions
1084:
1083:
773:Relaxation length
650:Formula One tyres
425:"Valve connector"
134:Romance languages
1124:
1074:
1073:
1066:Outline of tires
1064:
879:Tire maintenance
828:Treadwear rating
738:Circle of forces
660:Continental tire
600:Orange oil tires
590:Mud-terrain tire
570:All-terrain tire
502:
495:
488:
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320:v3.espacenet.com
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306:
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110:Sclaverand valve
80:Sclaverand valve
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27:
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1087:
1086:
1085:
1080:
1052:
1019:
991:
933:
865:
832:
808:Tire uniformity
768:Pneumatic trail
758:Ground pressure
753:Cornering force
719:
693:Siping (rubber)
664:
635:Motorcycle tyre
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228:
226:Valve extenders
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82:) is a type of
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12:
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5:
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1025:Identification
1021:
1020:
1018:
1017:
1012:
1007:
1001:
999:
993:
992:
990:
989:
987:Ozone cracking
984:
979:
974:
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967:Tire recycling
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959:
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834:
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800:
795:
793:Steering ratio
790:
785:
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745:
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735:
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721:
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718:
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713:Schrader valve
710:
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665:
663:
662:
657:
652:
647:
642:
637:
632:
627:
622:
617:
612:
607:
605:Whitewall tire
602:
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592:
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582:
577:
572:
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562:
557:
552:
547:
542:
537:
532:
527:
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372:
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338:Korrekturen.de
325:
307:
292:
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285:
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277:Schrader valve
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132:stands in the
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29:
22:
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20:
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18:
15:
13:
10:
9:
6:
4:
3:
2:
1129:
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1113:
1110:
1108:
1107:Bicycle parts
1105:
1103:
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1098:
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1069:
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1059:
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1028:
1026:
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1002:
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997:Organizations
994:
988:
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927:
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922:
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917:
915:
912:
910:
907:
905:
902:
900:
897:
895:
892:
890:
887:
885:
884:Tire rotation
882:
880:
877:
876:
874:
872:
868:
862:
859:
857:
854:
852:
851:Groove wander
849:
847:
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829:
826:
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769:
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764:
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759:
756:
754:
751:
749:
748:Contact patch
746:
744:
741:
739:
736:
734:
733:Camber thrust
731:
730:
728:
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643:
641:
638:
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633:
631:
628:
626:
623:
621:
618:
616:
613:
611:
610:Aircraft tire
608:
606:
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586:
583:
581:
578:
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571:
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566:
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553:
551:
548:
546:
543:
541:
540:Run-flat tire
538:
536:
533:
531:
528:
526:
525:Tubeless tire
523:
522:
520:
518:
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510:
503:
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387:
386:bicycling.com
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69:
55:
45:
44:bicycle wheel
41:
37:
33:
26:
1010:Tire Society
924:Tire changer
919:Bead breaker
889:Bicycle pump
798:Tire balance
708:Presta valve
707:
703:Dunlop valve
645:Racing slick
640:Tractor tire
625:Tubular tire
620:Bicycle tire
550:Airless tire
465:. Retrieved
457:mdmetric.com
456:
433:. Retrieved
419:
401:
389:. Retrieved
385:
375:
364:. Retrieved
337:
328:
319:
310:
301:
296:
282:Dunlop valve
262:Bicycle tire
246:
237:
217:
214:
197:
164:
160:
156:
143:
129:
125:
122:Presta valve
121:
118:French valve
117:
109:
107:
79:
75:
72:French valve
71:
68:Presta valve
67:
65:
1038:Plus sizing
962:Waste tires
914:Direct TPMS
899:Tire mousse
871:Maintenance
846:Aquaplaning
615:Tundra tire
595:Paddle tire
580:Knobby tire
530:Radial tire
391:19 November
140:Description
94:inner tubes
1097:Air valves
1091:Categories
1043:Tire label
939:Life cycle
861:Tramlining
788:Slip angle
725:Attributes
698:Valve stem
670:Components
655:Spare tire
585:Large tire
467:2016-11-10
435:2016-11-10
366:2020-04-07
334:"Synonyme"
288:References
272:Valve stem
267:Inner tube
98:valve stem
84:tire valve
1033:Tire code
982:Flat tire
972:Tire fire
929:Tire iron
838:Behaviors
630:Lego tire
565:Snow tire
560:Rain tyre
243:Threading
1076:Category
683:Beadlock
575:Bar grip
461:Archived
429:Archived
411:Archived
360:Archived
256:See also
249:ISO 4570
220:tubeless
151:Schrader
88:pressure
977:Blowout
957:Retread
91:bicycle
147:Dunlop
130:presto
126:Presta
70:(also
38:, and
36:spokes
1102:Tires
688:Tread
555:Tweel
517:Types
509:Tires
78:) or
42:of a
678:Bead
393:2021
252:mm.
149:and
108:The
104:Name
66:The
40:tire
128:or
32:rim
1093::
459:.
455:.
444:^
427:.
409:.
384:.
358:.
346:^
336:.
318:.
124:.
76:FV
34:,
501:e
494:t
487:v
470:.
438:.
395:.
369:.
74:(
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
