Filtriraj rezultate
Nankang Bridgestone Nokian Goodyear V (240 km/h) zimske pnevmatike
816 izdelka
![Bridgestone zimska pnevmatika 235/50/R17 Blizzak LM005 XL 100V](/slike/products/78/52/10835278/thumb80_bridgestone-zimska-guma-235-50-r17-blizzak-lm005-xl-100v_22f66464.jpeg)
1
ponudba
Dodaj na seznam želja
![Goodyear zimska pnevmatika 215/40R17 UltraGrip Performance XL FP 87V](/slike/products/25/36/9323625/thumb80_goodyear-zimska-pnevmatika-215-40r17-ultragrip-performance-xl-fp-87v_e5385444.jpeg)
2
ponudbe
Dodaj na seznam želja
![Bridgestone zimska pnevmatika 245/50/R19 Blizzak LM001 XL RFT 105V](/slike/products/73/01/5150173/thumb80_bridgestone-letna-pnevmatika-185-65-r14-86t-lm001-blizzak-dot2914_69ff4533.jpeg)
2
ponudbe
Dodaj na seznam želja
![Nokian zimska pnevmatika 225/60R18 WR SUV 104V](/slike/products/51/99/9409951/thumb80_nokian-zimska-guma-225-60r18-wr-suv-104h-104v_213d819a.jpeg)
Nokian zimska pnevmatika 225/60R18 WR SUV 104V
od 177,50 €
2
ponudbe
Dodaj na seznam želja
![Goodyear zimska pnevmatika 275/35R21 UltraGrip Performance + XL 103V](/slike/products/09/89/38248909/thumb80_goodyear-zimska-guma-275-35r21-ultragrip-performance-xl-103v_27f6bc40.png)
3
ponudbe
Dodaj na seznam želja
![Nokian zimska pnevmatika 255/35R19 WR XL 96V](/slike/products/36/64/2336436/thumb80_nokian-zimska-guma-175-65r14-wrd3-82t_c5927940.jpeg)
1
ponudba
Dodaj na seznam želja
![Bridgestone zimska pnevmatika 275/40/R21 Blizzak LM005 107V](/slike/products/74/04/21340474/thumb80_bridgestone-275-40-r21-blizzak-lm005_9eba4310.jpeg)
1
ponudba
Dodaj na seznam želja
![Goodyear zimska pnevmatika 275/35R19 UltraGrip Performance MO 100V](/slike/products/83/93/48299383/thumb80_goodyear-zimska-guma-275-35r19-ultragrip-performance-mo-100v_ea01d4ba.jpeg)
1
ponudba
Dodaj na seznam želja
![Goodyear zimska pnevmatika 215/55R18 UltraGrip Performance XL TL SUV 99V](/slike/products/83/11/21781183/thumb80_goodyear-215-55r18-ultragrip-performance-xl-tl-suv_d383a63a.jpeg)
1
ponudba
Dodaj na seznam želja
![Goodyear zimska pnevmatika 265/50R20 UltraGrip Performance XL FP SUV 111V](/slike/products/92/34/11653492/thumb80_goodyear-zimska-guma-265-50r20-ultragrip-performance-xl-fp-suv-111v_687d873b.png)
2
ponudbe
Dodaj na seznam želja
![Goodyear zimska pnevmatika 235/40R19 UltraGrip Performance XL FP 96V](/slike/products/49/66/9736649/thumb80_goodyear-zimska-pnevmatika-235-40r19-ultragrip-performance-xl-fp-96v_e5385444.jpeg)
1
ponudba
Dodaj na seznam želja
![Nankang Winter Activa 4 ( 235/45 R18 98V XL )](/slike/products/69/40/15934069/thumb80_nankang-winter-activa-4-235-45-r18-98v-xl-_f49baaf9.jpeg)
1
ponudba
Dodaj na seznam želja
![Nankang zimska pnevmatika 255/40R20 Snow SV-3 XL 101V](/slike/products/19/31/5653119/thumb80_nankang-zimska-guma-255-40r20-snow-sv-3-xl-101v_e9de820c.jpeg)
2
ponudbe
Dodaj na seznam želja
![Goodyear zimska pnevmatika 295/40R21 UltraGrip Performance XL FP SUV 111V](/slike/products/77/62/28146277/thumb80_goodyear-zimska-guma-295-40r21-ultragrip-performance-xl-fp-suv-111v_e5a0ff14.jpeg)
3
ponudbe
Dodaj na seznam želja
![Goodyear zimska pnevmatika 245/45R21 UltraGrip Performance XL FP SUV 104V](/slike/products/13/77/16247713/thumb80_goodyear-zimska-guma-245-45r21-ultragrip-performance-xl-fp-suv-104v_81aba52c.jpeg)
1
ponudba
Dodaj na seznam želja
![Bridgestone zimska pnevmatika 265/40/R20 Blizzak LM005 104V](/slike/products/35/20/20402035/thumb80_bridgestone-265-40-r20-blizzak-lm005_9eba4310.jpeg)
1
ponudba
Dodaj na seznam želja
![Goodyear zimska pnevmatika 255/55R18 UltraGrip Performance XL 109V](/slike/products/23/77/4697723/thumb80_goodyear-zimska-guma-255-55r18-xl-ultragrip-performance-109h-109v_3384d8cf.png)
2
ponudbe
Dodaj na seznam želja
![Goodyear zimska pnevmatika 275/45R20 UltraGrip Performance XL 110V](/slike/products/72/59/15775972/thumb80_goodyear-zimska-guma-275-45r20-ultragrip-performance-xl-110v_bf9046de.jpeg)
2
ponudbe
Dodaj na seznam želja
![Nokian zimska pnevmatika 245/40R18 WR 97V](/slike/products/53/57/21685753/thumb80_nokian-zimska-guma-245-40r18-wr-97v_fcb51b1f.jpeg)
Nokian zimska pnevmatika 245/40R18 WR 97V
od 132,02 €
2
ponudbe
Dodaj na seznam želja
![Bridgestone zimska pnevmatika 205/55/R16 Blizzak LM005 XL RFT 94V](/slike/products/89/47/8514789/thumb80_bridgestone-zimska-guma-205-55-r16-blizzak-lm005-xl-rft-94v_7e82e647.jpeg)
5
ponudba
Dodaj na seznam želja
![Goodyear zimska pnevmatika 225/40R18 UltraGrip Performance XL FP 92V/92W](/slike/products/07/95/8889507/thumb80_goodyear-zimska-guma-225-40r18-ultragrip-performance-xl-fp-92v_a55577a1.png)
4
ponudbe
Dodaj na seznam želja
![Bridgestone zimska pnevmatika 255/45/R18 Blizzak LM005 XL 103V](/slike/products/90/52/10835290/thumb80_bridgestone-zimska-guma-255-45-r18-blizzak-lm005-xl-103v_22f66464.jpeg)
2
ponudbe
Dodaj na seznam želja
![Nokian Snowproof 1 ( 285/45 R20 112V XL )](/static/slike/blank_150x150.jpg)
1
ponudba
Dodaj na seznam želja
![Nokian Snowproof 2 SUV ( 265/45 R21 108V XL )](/static/slike/blank_150x150.jpg)
Nokian Snowproof 2 SUV ( 265/45 R21 108V XL )
od 263,49 €
2
ponudbe
Dodaj na seznam želja
![Goodyear zimska pnevmatika 255/35R19 UltraGrip Performance XL 96V](/slike/products/07/55/8705507/thumb80_goodyear-zimska-guma-255-35r19-ultragrip-performance-xl-96v_1e38ca74.jpeg)
2
ponudbe
Dodaj na seznam želja
![Bridgestone zimska pnevmatika 205/50/R17 Blizzak LM005 XL RFT 93V](/slike/products/48/48/11174848/thumb80_bridgestone-zimska-guma-205-50-r17-blizzak-lm005-xl-rft-93v_22f66464.jpeg)
3
ponudbe
Dodaj na seznam želja
![Nokian zimska pnevmatika 265/45R20 WR XL SUV 108V](/slike/products/59/29/6412959/thumb80_nokian-zimska-guma-235-60r18-xl-wr-suv-107v_69b5f772.jpeg)
2
ponudbe
Dodaj na seznam želja
![Goodyear zimska pnevmatika 265/40R21 UltraGrip Performance XL FP 105V](/slike/products/85/34/17633485/thumb80_goodyear-zimska-guma-265-40r21-ultragrip-performance-xl-fp-105v_62688107.jpeg)
3
ponudbe
Dodaj na seznam želja
![Goodyear zimska pnevmatika 245/45R19 UltraGrip Performance 102V](/slike/products/51/98/16559851/thumb80_goodyear-zimska-guma-245-45r19-ultragrip-performance-102v_19fe2df2.jpeg)
2
ponudbe
Dodaj na seznam želja
![Nokian Snowproof 1 ( 255/45 R18 103V XL )](/slike/products/36/83/46498336/thumb80_zimske-auto-gume-nokian-snowproof-1-255-45-r18-103v-xl-_42dff025.png)
1
ponudba
Dodaj na seznam želja
![Nankang Winter Activa 4 ( 215/45 R18 93V XL )](/slike/products/73/36/15273673/thumb80_nankang-winter-activa-4-215-45-r18-93v-xl-_f49baaf9.jpeg)
1
ponudba
Dodaj na seznam želja
![Goodyear zimska pnevmatika 275/35R21 UltraGrip Performance FP 103V](/slike/products/14/27/50392714/thumb80_zimske-auto-gume-goodyear-275-35r21-ultragrip-performance-fp_2c7a47ee.jpeg)
1
ponudba
Dodaj na seznam želja
![Bridgestone zimska pnevmatika 265/45/R21 Blizzak LM005 XL 108V](/slike/products/95/06/10790695/thumb80_bridgestone-zimska-guma-265-45-r21-blizzak-lm005-xl-108v_22f66464.jpeg)
2
ponudbe
Dodaj na seznam želja
![Nokian zimska pnevmatika 265/45R21 WR XL SUV 108V](/slike/products/69/02/6670269/thumb80_nokian-zimska-guma-265-45r21-wr-xl-suv-108v_48f7f437.jpeg)
1
ponudba
Dodaj na seznam želja
![Goodyear zimska pnevmatika 225/50R19 UltraGrip Performance SUV 100V](/slike/products/85/00/20040085/thumb80_goodyear-225-50r19-ultragrip-performance-suv_b54329e1.jpeg)
1
ponudba
Dodaj na seznam želja
![Bridgestone zimska pnevmatika 235/45/R19 Blizzak LM80 EVO 95V](/slike/products/89/97/5149789/thumb80_bridgestone-zimska-guma-215-65-r16-xl-blizzak-lm80-evo-102h_f8c1ffff.jpeg)
1
ponudba
Dodaj na seznam želja
![Nankang zimska pnevmatika 225/45R19 Snow SV-3 XL 96V](/static/slike/blank_150x150.jpg)
1
ponudba
Dodaj na seznam želja
![Goodyear zimska pnevmatika 255/45R19 UltraGrip Performance XL FP 104V](/slike/products/10/39/11673910/thumb80_goodyear-zimska-guma-255-45r19-ultragrip-performance-xl-fp-104v_d9bbb4ab.png)
4
ponudbe
Dodaj na seznam želja
![Nokian Snowproof 2 SUV ( 255/50 R20 109V XL, SilentDrive )](/static/slike/blank_150x150.jpg)
1
ponudba
Dodaj na seznam želja
![Nokian Snowproof 1 ( 245/50 R18 104V XL )](/slike/products/40/77/47867740/thumb80_nokian-245-50r18-104v-snowproof-1-xl_6887abad.jpeg)
1
ponudba
Dodaj na seznam želja
![Nokian zimska pnevmatika 295/40R21 WR XL SUV 111V](/slike/products/75/21/6462175/thumb80_nokian-zimska-guma-295-40r21-wr-xl-suv-111v_69b5f772.jpeg)
1
ponudba
Dodaj na seznam želja
![Nokian zimska pnevmatika 225/45R18 WR 95V](/slike/products/41/85/9408541/thumb80_nokian-zimska-guma-225-45r18-wr-95v_85a47800.jpeg)
Nokian zimska pnevmatika 225/45R18 WR 95V
od 154,53 €
2
ponudbe
Dodaj na seznam želja
![Goodyear zimska pnevmatika 235/55R17 UltraGrip XL SUV 103V](/slike/products/35/97/4699735/thumb80_goodyear-zimska-pnevmatika-235-55r17-xl-tl-ultragrip-suv-103v_3970bbbe.jpeg)
1
ponudba
Dodaj na seznam želja
![Nokian zimska pnevmatika 255/45R19 WR XL SUV 104V](/slike/products/55/22/10882255/thumb80_nokian-zimska-guma-255-45r19-wr-xl-suv-104v_973226bf.jpeg)
1
ponudba
Dodaj na seznam želja
![Goodyear zimska pnevmatika 235/50R17 UltraGrip Performance XL FP 100V](/slike/products/29/36/9323629/thumb80_goodyear-zimska-pnevmatika-235-50r17-ultragrip-performance-xl-fp-100v_e5385444.jpeg)
3
ponudbe
Dodaj na seznam želja
![Nokian Snowproof 2 SUV ( 235/50 R20 104V XL )](/slike/products/04/08/44020804/thumb80_nokian-snowproof-2-suv-235-50-r20-104v-xl-_ce35e100.jpeg)
Nokian Snowproof 2 SUV ( 235/50 R20 104V XL )
od 246,90 €
2
ponudbe
Dodaj na seznam želja
![Nankang zimska pnevmatika 315/40R21 Snow SV-3 XL 115V](/slike/products/91/01/23030191/thumb80_nankang-315-40r21-snow-sv-3-xl_138450d.jpeg)
2
ponudbe
Dodaj na seznam želja
![Bridgestone zimska pnevmatika 255/40/R19 Blizzak LM005 XL 100V](/slike/products/05/53/10835305/thumb80_bridgestone-zimska-guma-255-40-r19-blizzak-lm005-xl-100v_22f66464.jpeg)
2
ponudbe
Dodaj na seznam želja
![Nokian zimska pnevmatika 255/35R19 WR XL M + S 96V](/slike/products/93/32/48953293/thumb80_zimske-auto-gume-nokian-255-35r19-wr-xl-m-s_3aa53588.jpeg)
1
ponudba
Dodaj na seznam želja
![Nokian zimska pnevmatika 295/40R20 WR SUV 3 XL M + S SUV 110V](/slike/products/28/38/48973828/thumb80_zimske-auto-gume-nokian-295-40r20-wr-suv-3-xl-m-s-suv_cccc5903.jpeg)
1
ponudba
Dodaj na seznam želja
![Goodyear zimska pnevmatika 225/50R19 UltraGrip Performance XL FP SUV 100V](/slike/products/99/61/16386199/thumb80_goodyear-zimska-guma-225-50r19-ultragrip-performance-xl-fp-suv-100v_c5a8299.png)
1
ponudba
Dodaj na seznam želja
![Goodyear zimska pnevmatika 245/50R18 UltraGrip Performance XL FP 104V](/slike/products/03/68/9286803/thumb80_goodyear-zimska-guma-245-50r18-ultragrip-performance-xl-fp-104v_314b3e73.png)
4
ponudbe
Dodaj na seznam želja
![Goodyear zimska pnevmatika 225/55R19 UltraGrip Performance + 99V](/slike/products/10/42/45454210/thumb80_goodyear-zimska-guma-225-55r19-ultragrip-performance-99v_a16cb208.jpeg)
1
ponudba
Dodaj na seznam želja
![Goodyear zimska pnevmatika 235/45R17 UltraGrip Performance 97V](/slike/products/01/94/20039401/thumb80_goodyear-235-45r17-ultragrip-performance_2a6ade3b.jpeg)
1
ponudba
Dodaj na seznam želja
![Nokian zimska pnevmatika 255/45R19 WR 104V](/slike/products/92/04/21340492/thumb80_nokian-255-45r19-wr_7adbc861.jpeg)
Nokian zimska pnevmatika 255/45R19 WR 104V
od 216,70 €
2
ponudbe
Dodaj na seznam želja
![Goodyear zimska pnevmatika 255/40R22 UltraGrip Performance SUV 103V](/slike/products/26/05/20040526/thumb80_goodyear-255-40r22-ultragrip-performance-suv_b54329e1.jpeg)
1
ponudba
Dodaj na seznam želja
![Goodyear zimska pnevmatika 255/55R20 UltraGrip 1 Performance XL SUV 110V](/slike/products/03/61/8476103/thumb80_goodyear-zimska-pnevmatika-255-55r20-ultragrip-1-performance-xl-suv-110v_70492dc3.jpeg)
2
ponudbe
Dodaj na seznam želja
![Bridgestone zimska pnevmatika 205/55/R17 Blizzak LM005 XL 95V](/slike/products/73/19/8621973/thumb80_bridgestone-zimska-guma-205-55-r17-blizzak-lm005-xl-95v_899965ba.jpeg)
4
ponudbe
Dodaj na seznam želja
![Goodyear zimska pnevmatika 245/40R18 UltraGrip Performance XL FP 97V](/slike/products/27/90/4699027/thumb80_goodyear-zimska-guma-245-40r18-xl-ultragrip-performance-fp-97v-97w_cd154a78.png)
1
ponudba
Dodaj na seznam želja
![Goodyear zimska pnevmatika 265/50R19 UltraGrip Performance + XL SUV 110V](/slike/products/53/82/36168253/thumb80_goodyear-zimska-guma-265-50r19-ultragrip-performance-xl-suv-110v_d383a63a.jpeg)
4
ponudbe
Dodaj na seznam želja
![Nokian zimska pnevmatika 275/35R19 WR XL 100V](/slike/products/80/74/11017480/thumb80_nokian-zimska-guma-275-35r19-wr-xl-100v_fea192ba.jpeg)
1
ponudba
Dodaj na seznam želja
![Bridgestone zimska pnevmatika 255/45/R20 Blizzak LM005 105V](/slike/products/61/83/9418361/thumb80_bridgestone-zimska-guma-255-45-r20-blizzak-lm005-105v_fd427a50.jpeg)
2
ponudbe
Dodaj na seznam želja
![Bridgestone zimska pnevmatika 315/40/R21 Blizzak LM005 XL TL 115V](/slike/products/87/21/19722187/thumb80_bridgestone-315-40-r21-blizzak-lm005-xl_f176cae8.jpeg)
2
ponudbe
Dodaj na seznam želja
![Nokian zimska pnevmatika 235/55R19 WR XL M + S SUV 105V](/slike/products/33/23/48952333/thumb80_zimske-auto-gume-nokian-235-55r19-wr-xl-m-s-suv_dfdf1ed3.jpeg)
1
ponudba
Dodaj na seznam želja
![Goodyear zimska pnevmatika 275/40R18 UltraGrip Performance XL FP 103V](/slike/products/73/49/12444973/thumb80_goodyear-zimska-guma-275-40r18-ultragrip-performance-xl-fp-103v_815f5c69.jpeg)
3
ponudbe
Dodaj na seznam želja
![Goodyear zimska pnevmatika 265/45R20 UltraGrip Performance XL FP 108T/108V](/slike/products/60/33/11653360/thumb80_goodyear-zimska-guma-265-45r20-ultragrip-performance-xl-fp-108v_cdabff6f.png)
4
ponudbe
Dodaj na seznam želja
![Goodyear zimska pnevmatika 205/45R17 UltraGrip 8 XL FP 88V](/slike/products/80/32/11973280/thumb80_goodyear-zimska-guma-205-45r17-ultragrip-8-xl-fp-88v_f7a7d2e5.jpeg)
2
ponudbe
Dodaj na seznam želja
![Nokian Tyres 235/65R17 108V NOKIAN SNOWPROOF 2 SUV](/slike/products/36/96/44929636/thumb80_zimske-auto-gume-nokian-snowproof-2-suv-235-65-r17-108v-xl-_42dff025.png)
2
ponudbe
Dodaj na seznam želja
![Nokian zimska pnevmatika 255/45R18 WR XL 103V](/slike/products/06/43/2354306/thumb80_nokian-zimska-guma-175-65r14-wrd3-82t_c5927940.jpeg)
Nokian zimska pnevmatika 255/45R18 WR XL 103V
od 543,94 €
2
ponudbe
Dodaj na seznam želja
![Nankang Winter Activa 4 SUV ( 255/55 R18 109V XL )](/slike/products/78/54/15615478/thumb80_nankang-winter-activa-4-suv-255-55-r18-109v-xl-_f49baaf9.jpeg)
1
ponudba
Dodaj na seznam želja
![Goodyear zimska pnevmatika 245/50R20 UltraGrip Performance SUV 105V](/slike/products/47/96/20039647/thumb80_goodyear-245-50r20-ultragrip-performance-suv_36821857.jpeg)
1
ponudba
Dodaj na seznam želja
![Nokian zimska pnevmatika 205/55R17 WR XL 95V](/slike/products/20/64/2336420/thumb80_nokian-zimska-guma-175-65r14-wrd3-82t_c5927940.jpeg)
Nokian zimska pnevmatika 205/55R17 WR XL 95V
od 142,13 €
2
ponudbe
Dodaj na seznam želja
![Goodyear zimska pnevmatika 235/55R19 UltraGrip Performance SUV 105V](/slike/products/85/32/9413285/thumb80_goodyear-zimska-guma-235-55r19-ultragrip-performance-suv-105v_23fa9665.jpeg)
1
ponudba
Dodaj na seznam želja
![Goodyear zimska pnevmatika 215/55R17 UltraGrip 8 98V](/slike/products/86/95/23259586/thumb80_goodyear-zimska-guma-215-55r17-ultragrip-8-98v_3d7f3af0.jpeg)
1
ponudba
Dodaj na seznam želja
![Bridgestone zimska pnevmatika 275/35/R21 Blizzak LM005 XL 103V](/slike/products/20/56/10835620/thumb80_bridgestone-zimska-guma-275-35-r21-blizzak-lm005-xl-103v_22f66464.jpeg)
5
ponudba
Dodaj na seznam želja
![Goodyear zimska pnevmatika 275/40R20 UltraGrip Performance XL FP 106V](/slike/products/50/38/22263850/thumb80_goodyear-275-40r20-ultragrip-performance-xl-fp_4200ee6a.png)
1
ponudba
Dodaj na seznam želja
![Goodyear zimska pnevmatika 275/40R20 UltraGrip Performance 106V](/slike/products/81/01/20040181/thumb80_goodyear-275-40r20-ultragrip-performance_aabd6ea3.jpeg)
1
ponudba
Dodaj na seznam želja
![Nokian zimska pnevmatika 245/50R18 WR XL M + S 104V](/slike/products/00/03/17980300/thumb80_nokian-zimska-guma-245-50r18-wr-xl-m-s-104v_383db0fc.jpeg)
2
ponudbe
Dodaj na seznam želja
![Goodyear zimska pnevmatika 255/45R20 UltraGrip Performance XL 105V](/slike/products/97/23/5932397/thumb80_goodyear-zimska-guma-255-45r20-ultragrip-performance-xl-105t-105v_bf9046de.jpeg)
1
ponudba
Dodaj na seznam želja
![Bridgestone zimska pnevmatika 245/45/R20 Blizzak LM005 XL M + S 103V](/slike/products/92/95/21699592/thumb80_bridgestone-zimska-guma-245-45-r20-blizzak-lm005-xl-tl-m-s-103v_df878e85.jpeg)
3
ponudbe
Dodaj na seznam želja
Proizvajalec
Anteo (0)
LingLong (22)
Aplus (27)
Matador (43)
Apollo (5)
Maxxis (47)
Atlas (21)
Michelin (370)
Austone (26)
Minerva (61)
Avon (11)
Momo (7)
Barum (55)
Nankang (78)
BF Goodrich (22)
Nexen (186)
Bridgestone (189)
Nokian (178)
Continental (323)
Nordexx (1)
Cooper (33)
Petlas (34)
Davanti (2)
Pirelli (507)
Debica (13)
Riken (21)
Delinte (1)
Rotalla (43)
Dunlop (223)
Sailun (19)
Falken (160)
Sava (44)
Federal (0)
Sebring (31)
Firestone (46)
Semperit (69)
Fortuna (10)
Sportiva (8)
Fulda (101)
Star Performer (1)
General Tire (0)
Starmaxx (5)
Gislaved (14)
Sumitomo (7)
Goodride (42)
Sunny (1)
Goodyear (371)
Taurus (22)
Gripmax (132)
Tigar (17)
Hankook (389)
Torque (1)
Hifly (1)
Toyo (91)
Imperial (12)
Tracmax (20)
Infinity (8)
Triangle (1)
Kama (0)
Tristar (39)
Kelly (1)
Uniroyal (90)
Kingstar (0)
Viking (39)
Kleber (82)
Vredestein (103)
Kormoran (22)
West Lake (33)
Kumho (122)
Yokohama (112)
Lassa (40)
Ni podatkov (381)
Laufenn (18)
Širina
Višina
Premer ®
Indeks hitrosti